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A55065 The catholique planisphaer which Mr. Blagrave calleth the mathematical jewel briefly and plainly discribed in five books : the first shewing the making of the instrument, the rest shewing the manifold vse of it, 1. for representing several projections of the sphere, 2. for resolving all problemes of the sphere, astronomical, astrological, and geographical, 4. for making all sorts of dials both without doors and within upon any walls, cielings, or floores, be they never so irregular, where-so-ever the direct or reflected beams of the sun may come : all which are to be done by this instrument with wonderous ease and delight : a treatise very usefull for marriners and for all ingenious men who love the arts mathematical / by John Palmer ... ; hereunto is added a brief description of the cros-staf and a catalogue of eclipses observed by the same I.P. Palmer, John, 1612-1679. 1658 (1658) Wing P248; ESTC R11098 148,140 211

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to take your points in the Tropiques at the largest distance as I have here done if there be room enough on the Cieling But because it often happens that part of your Dyal falls beside the Cieling and the plain of the Cieling and of the Walls is often interrupted and made Irregular by Beams Wal-plates Corrishes Wainscot Chimney-peeces and such like bodyes I will ●hew you one absolute device to carry on your Hour lines over all Extend the thred for any Hour line to the Tropique of Cancer ●n the Cieling as you where taught before and fix it there and extend another thred in like manner to the Tropique of Copricorn where ever it shall happen as perhaps beyond the middle beam or quite beyond the Cieling upon the Wall and fix that thred also Then place your Ey so behind these threds that one of them may cover the other and at the same instant where the upper line to your Sight or Imagination cuts the Cieling Beams Wall or any Regular or Irregular body above the end of the lower line there shall the Hour line pass from Tropique to Tropique direct any By-stander to make marks as many as you shall need and by these marks draw the Hour line according to your desire If the arch of the Horizon between the Tropiques be within view of your Window you shall draw the same on the Wall to bound the Parallels the Horizons Altitude you know is nothing and therefore he will be a level line and the Suns Azimuth when he riseth commonly called Amplitude and Ortive Latitude is in Cancer 40.40 minutes East Northward and in Capricorn as much Southward and these will be reflected to the contrary coasts on the Dyal The end of the Fifth Book A breif Description Of a CROSS-STAFF THe Cross-staff consisteth of two Rules joyned by a socket or else pinned in the form of a Romane T and three Sights or more The longer Ruler is called Radius Index and the Yard as A B of which I call A the neer end B the further end The breadth would be ¾ of an inch the depth an inch and half the length 70 or 80. inches and every of those inches would be divided by Parallels and Diagonal lines into 100. equal parts The shorter Ruler E F is called the Transom it would be half an inch or three quarters both in breadth and depth and in length about 2. foot for the Sights there if I may advise you would never be set above 20 inches asunder This Transom would be divided into whole inches onely beginning in the midst at B in the visual line ☉ B. and numbred to 10 both wayes The Sights C and D must have sockets at the bottom through which the Transom must pass so that the Sights may be set to any division of the Transom The Vanes or tops of those Sights must have onely two edges on their sides visible to your ey namely those edges which touch the Transom and the two other edges must be pared away The middle Sight at B would have half his head cut away and a shoulder left as in the Figure and a tenon at the bottom fitted to a mortess made in the middle of the Transom that you may stick him in and take him out when you please for to this mortess you shall do well to fit two other moveable Sights very narrow for observing the Diameter of the Moon or the distance of Stars which are very neer one may be about half an inch broad and the other about a quarter This Cross-staff is exactly made by Mr. Anthony Thomson in Hosier lane London When you would use this Staff you shall first set the Sights of the Transom to like inches as at 10 and 10. if the angle be great or at 5 and 5. as in the Figure they are placed alwayes set them at whole inches and at like numbers on both sides from the middle of the Transom and choose to place those Sights so that your Ey-sight may be far distant from them in observing for so you may the more distinctly observe the minutes and seconds of the angle inquired Then resting the further end of the Index upon a Wall or some device fitted for that purpose put the neer end over your right shoulder and setting your Ey to the Ey-hole slip the Index backward or forward till you see the objects by the sides of the Sights of the Transom and mark what number the backside of the Ey-sight cutteth upon the Index for that shall give you the angle sought in this manner Example The Sights of the Transom being set at 5 and 5 that is 10. inches asunder I observed two Steeples by their edges and the Ey-sight then cut upon the Index 6625. that is inches 66 ¼ from the Transom I say therefore As C B 500. to B G 6625. so C B Radius or 100000. to B G the Co-tangent of half the angle Here I have no more to do then to divide 662500000. by 500. or 6625000. by 5. which is an easy work and the Quotient 1325000. is the Co-tangent of 4. degrees 18. minutes 57. seconds 43. thirds for half the angle Note here that if the Sights had stood at 10 and 10. then had the number 6625. been the very Co-tangent of half the angle and remembring that your Radius on the Transom hath but 1000 actual parts go to the Canon and cutting off so many places as may leave the Radius there but 1000. you shall find your number 6625 to be the Co-tangent of 8. 35 minutes Note also that you may observe the angle between the middle Sight and one of the other and then you find the Co-tangent of the whole angle to that Radius to which your Sight is set on the Transom as to the Radius 200. 300. or any other even hundred to 1000. Note further that you must evermore observe neer the tops of your Sights that the visual lines may run above the Transom as much as the Ey is placed above the plain of it He that will may have room to set several Scales of degrees and minutes to several Radiusses as one to the Radius 300. another to 500. another to 700. by which the very degrees and minutes may be presently had without recourse to the Tables To me the Scale of equal parts is in stead of all The Commodities of this disposition of the Staff are these 1. It is better managed when it rests upon the shoulder and the Ey-sight being made to move while the Transom and his Sights stand Fixed shall save you much labour of coursing up and down from one end of the Staff to the ●●●er in observing 2. The Ey-sight being made to shew the angle by the length of the Co-tangents shall alwayes give you large differences insomuch that if your Staff be but 6. foot long you may observe to Seconds and Thirds in lesser angles and till you come beyond 20. degrees your Sight shall seldom move
square to the line A B but if any of these have failed you shall never bring the three points into an arch while the foot of your compass ●andeth in the line C D. Therefore in such case set one foot in A and draw with the other foot a short arch crossing the line C D then set the standing foot in B and with the running foot cross the short arch last drawn where these arches cross will be the center by which you may draw an arch cutting A and B and if it cut 2 also you have your desire But if this arch over reach 2 widen your Compass if it come short of 2 the middle point narrow your Compass and try again in like manner till you can compass all the three points in the same arch 3. A third way I suppose you may know that every Meridian cuts the Equator twice viz. in two opposite points distant 180 degr one from another as for example the Meridian which cutteth the Equator in 60 degr of Right Ascension cuts it again in the opposite degr viz. 240. Now if you can find these two points in the Equator line C D the center will be in the just middle betwixt them One of these points is already given within the fundamental Circle the other without is thus found Prolong your Equator infinitely beyond your plate both wayes and divide the extension thereof by like reason as you divided his Diameter viz. as by a Ruler laid from A to the several deg of the Quadrant B C you devided the Semidiameter E C into 90 degr so keeping still one end of your Ruler fixed at A and carrying about the other end thereof to the severall degrees of the Quadrant C A you may divide the excurrence of the line E C into 90 degr more and so E C and his exccurrence or continuation will be half the Equator divided into his degr and E D with his excurrence on the other side will be the other half divided by like reason And thus the whole Equator is projected in one straight line and divided into degr also Then having a point given within your fundamental circle through which the sixtieth Meridian must pass viz the 60 deg of the Semidimeter E C or E D number thence over the center to 180 deg and there is the point where the other semicircle must cross and the middle between those points is the center But because the two points taken in the quadrant A C are very near together especially towards A and the Ruler also will cross the prolongation of the line E C very obliquely you may therefore do better to divide this line into his degr by a Scale of Tangents for if upon the Equinoctial line D E C you prick down from E both wayes the Tangents of the half degr in order from 0 to 90 those pricks shall be the whole degr of the Equinoctial line in this Projection to be numbred from E both wayes to 180 deg where the Tangent becomes infinite Thus taking A E for Radius E D is the Tangent of 45 deg by the structures yet the arch or Diameter E D is a Quadrant or 90 deg of the Equinoctial in this Projection because the Tangents of the half deg of the Quadrant E A I measure out the whole degr of the line E D as was above-said 4 If you consider well what hath been said you will find or you may take it here upon trust that for the 90 Meridians to be drawn between C and E half the centers will be found in the opposite Semidiameter E D and the other half without D in the said Semidiameter prolonged And that every second division of the line E D from E toward D and forwards shall be the centers of the Meridians which cut the Semidiameter C E. As for example to draw every fifth Meridian from C to E you take every tenth deg from E toward D for the centers And further if you would not be at more trouble then needs to divide the extension of the Diameter beyond the fundamental circle you shall but do thus Begin with the crookedest Meridians first whose centers are within the fundamental Circle and first pitching one foot of your Compass in the point 1 near E extend the other foot beyond the center to 2 there is the center from which you shall draw the first Meridian A 1 B and also turning about your Compass you shall make a marke in the extension beyond D at 1 where the other Semicircle of this Meridian would cross the Equator So for the next Meridian in the line C E marked with 2 your center is beyond E at 4 and after you have drawn his arch A 2 B marke with your compass his other crossing at 2 beyond D and so with one labour you shall both draw the 45 crookeder Meridians and also make the out lying division of the line E D prolonged of which division every second or even number will be a center to some of the straighter Meridians This is a very good and easie way and this way Mr Blagrave alwaies used 5 Or lastly You may frame a decimal Scale of 1000 or 10000 parts equal to the Semidiameter of the Mater by which Scale with the help of the Cannon of Triangles you may presently find the length of any S ne Tangent or Secant you shall desire Now look what inclination any Meridian hath to your fundamental Circle that is what angle they make between them the Secant of that inclination is the Semidiameter of that Meridian and the Tangent of the same inclination is the distance of his center from E the center of the Mater For example the Meridian A 2 B his inclination is 20 deg for the angle C A 2 and likewise the arch C 2 which measures it is 20 degr the S cant of 20 degr is 10641. by the Cannon of Triangles which every Mathematician ought to have at hand Take with your Compasses from your decimal Scale 10641. and setting one foot in A with the other foot cross the Semidiameter E D in that crossing is the center or take with your Compasses 3639. the Tangent of 20 degr and set it from E toward D and it shall give you the same center at 4. For A E being Radius E 4 is the Tangent and A 4 the Secant of 20 deg by the structure And if you like to work this way it will help you much to have a short Cannon of Tangents and Secants of whole degr of the Quadrant gathered into one page which Cannon for your ease is here annexed A Table of Tangents and Secants to every degree of the Quadrant Degr Tan. Secan 1 00174 010001 2 00349 010006 3 00524 010013 4 00699 010024 5 00374 010038 6 01051 010055 7 01227 010075 8 01405 010098 9 01583 010124 10 01763 010154 11 01943 010187 12 02125 01022● 13 02308 010263 14 02493 010306 15 02679
010352 16 02867 010402 17 03057 010456 18 03249 010514 19 03443 010576 20 03639 010641 21 03838 010711 22 04040 010785 23 04244 010863 23.30 04348 010904 24 04452 010946 25 04663 011033 26 04877 011126 27 05095 011223 28 05317 011325 29 05543 011433 30 05773 011547 31 06008 011666 32 06248 011791 33 06494 011923 34 06745 012062 35 07002 012207 36 07265 012360 37 07535 012521 38 07812 012690 39 08097 012867 40 08390 013054 41 08692 013250 42 09004 013456 43 09325 013673 44 09656 013901 45 10000 014142 46 10355 014395 47 10723 014662 48 11106 014944 49 11503 015242 50 11917 015557 51 12348 015890 52 12799 016242 53 13270 016616 54 13763 017013 55 14281 017434 56 14825 017882 57 15398 018360 58 16003 018870 59 16642 019416 60 17320 02000 61 18040 020626 62 18807 021300 63 19626 022026 64 20503 022811 65 21445 023662 66 22460 024585 66.30 22998 025078 67 23558 025693 68 24750 026694 69 26050 027904 70 27474 029238 71 29042 030715 72 30776 032360 73 32708 034203 74 34874 036279 75 37320 038637 76 40107 041335 77 43314 044454 78 47046 048097 79 51445 052408 80 56712 057587 81 63137 063924 82 71153 071852 83 8144● 082055 84 9514● 095667 85 11430 114737 86 14300 143355 87 19081 191073 88 28636 286537 89 57289 572986 90     CHAP. IIII. To find the Centers of the Parallels six several wayes THe first way but the worst for our purpose as was said before for the Meridians is by the fifth Proposition of the fourth book of Euclid to find the Center of the Circle circumscribing the Triangle made by the three points given 2 A better way is by profers Take this upon trust that as you found the Centers of all the Meridians in the Equator so shall you find the Centers of all the Parallels in the Axtree line prolonged and by making like profers as you were taught for the Centers of the Meridians Chap. 3. you may quickly find the Centers of the Parallels 3 A third way You must consider that the Axtree line represents the East Meridian as well as the Axis of the world which is a common Diameter to all the Meridians Also that every Parallel cuts the East Meridian as it doth the rest in two points Equidistant from the Equinoctial and two Equidistant also from the Poles Therefore having one point already given in the Axtree line within the fundamental Circle where the Parallel shall cut number the distance from this point to the next Pole and number also the same distance again beyond the Pole in the Axtree-line prolonged being divided also as you were taught to divide the Equator line Chap. 3. and at the end of this number shall the Parallel out the Axtree line again And the middle between these two sections is the Center For example the 50th Parallel is 40 degr distant from the Pole Count therefore in the Axtree line prolonged 40 degr beyond the Pole and there is the utter end of this Parallels Diameter which if you part in two the middle at G is the Center 4 If from the point given where the Parallel cuts the great Meridian you raise a Tangent line this Tangent shall cut the Axtree line in the Center of the Parallel Example The said 50th Parallel cuts the great Meridian at H there I raise the Targent H G perpendicular to the Radius E H. And this Tangent as you see cuts the Axtree line in G the Center of the Parallel 5 Hence ariseth a fifth way For it appears by this figure that the Tangent of the Parallels distance from the Pole is equal to his Semidiameter and that the Secant of his distance from the Pole is equal to the distance of his Center from the Center of the great Meridian For here E H is Radius H B an arch of 40 degr H G the Tangent thereof and Semidiameter of the Parallel E G the Secant thereof and the distance of the Center of the Parallel from the Center of the Meridian And all this is evident by the structure in the Scheam Wherefore making E H Radius take from your Scale or Sector with your Compasses the Secant of the Parallels distance from the Pole and set it from E in the Axtree line and it shall end in the Center of the Parallel Or take the Tangent of the Parallels distance from the Pole and set it from the point of his Section with the Meridian toward the extension of the Axtree line and where the end of it just toucheth the Axtree line there is the Center 6 For want of a Sector or other fit Scales of Tangents and Secants you may do thus Set one foot of your Compass in the Center E and extend the other upon the Diameter of the Equator or Axtree line to twice so many degr as your Parallel is distant from the Pole That distance is the very Tangent you seek For example for the 40th Parallel from the Pole I number from E toward D 80 degr to 8. now E 8 is the Tangent of 40 degr though it contain just twice so many degr of the Circle foreshortned in this projection as hath been shewed Chap. 3. Sect. 3. and so if you will have the Secant of 40 degr take with your Compasses the length from 8 where the Tangent ends to A. and that is the Secant to be used as was taught in the last Section Thus have you wayes enough for finding the Centers of the Meridians and Parallels And you may have occasion in the making of the Instrument to use most of them one time or other However the knowledge of them is both pleasant and usefull for the right understanding of this and other Projections of the Sphear as also for the examination of your work when you shall chance to doubt of it CHAP. V How to draw the straighter Meridians and Parallels whose Semidiameters are very long IT may trouble you very much to draw those Meridians and Parallels which lie near to the Diameters because they be arches of great Circles and require Compasses larger then you can well get or manage when you have gotten them Till you come to the 80th Meridian from the Limb a Beam-compass of a yard long will reach if your Mater be not above a foot Diameter and a longer Beam you cannot well manage for it will be apt to tremble with it's own weight and draw double lines though it be made very thick and massie But the 89th Meridian will require a Beam-compass of almost ten yards long For his Semidiameter will contain the Semidiameter of the great Meridian 57 times Therfore to draw the 10 last Meridians and the 10 last Parallels you may help your self one of these wayes 1. Guido Vbaldus hath devised an Instrument for this purpose consisting of three rulers in form of an obtuse Triangle The description and use thereof you may see in Blagr l. 4. c 2 3. and in Vbaldus his book
De Theorica Astrolabij But though it be an Ingenious device yet I have found by experience that it is a ticklish Instrument and hardly managed for which reason I have hanged it by 2 The Bow now commonly used is an Instrument not so artificial but more tractable and steddy then the former It is made of too steel rulers the shorter of them must be of good substance as three quarters of an inch in heighth and as much in breadth that it may be stiff and lie flat the length must be somewhat more then the Diameter of your Instrument The other may be an inch longer of the same heighth but much narrower that it may be bent out with screws into an arch of any Circle required which ruler so bent being laid to the three points given you may by it draw the arch required as easily as you draw a straight line by a straight ruler The stiff ruler carries the screws and it must have rivets by which the bending ruler may be staied at both ends while it is bent by the screws See the figure CHAP. VI. How to draw the Tropiques and Polar Circles and to finish the Mater BEsides the 180 Parallels aboy ementioned you have four more to draw before the Mater is finished viz. the two Tropiques and the two Polar Circles of which the Northern is called the Arctique and the other the Antarctique Circle How to draw these you are sufficiently instructed Chap. 4. if you know but their Declination for they be Parallels The Tropique of Cancer declineth from the Equator toward the North Pole 23 degr 30 min. and the Tropique of Capricorn declines as much toward the South Pole The Arctique Circle declines Northward 66 degr 30 min. and the Antarctique as much Southward And these being drawn after the manner of the other Parallels you have drawn all the lineaments of the Mater And the better to adorn and distinguish them you shall with your Graver hatch every fifteenth Meridian for they are hour lines The South arch of the great Meridian A C B is the hour of Noon and his North arch A D B the hour of Midnight These need not be hatched being the Semicircles of the great Meridian or fundamental Circle which contains all but the Axtree line A E B which is the hour line of the sixes and the rest of the hour lines counted from him both waies would be hatched on both fides to shew like a ragged staff for distinction sake Also every fifth Meridian not being a fifteenth you shall make a pricked line not punching it with a round point lest you make your plate warp but making many short strokes cross the line with your Graver which will be more conspicuous Every tenth Parallel also would be a ragged line and the intermediate fifths pricked lines likewise the Tropiques and Polar Circles would be pricked lines Also if your plate be large you may set figures to the hour lines and to every tenth Meridian at the Equator but if your plate be smal the divisions of the Label applied upon the Equator may supply the lack of them CHAP. VII Of the Reet or Nets HAving shewed you what belongs to the Fabrique of the first part of this Instrument called the Mater A few words more will instruct you how to make the Reet whose lineaments are for the most part the same The Reet is a round plate of metal or pastboard like unto the Mater but of less Diameter it must be well planished and polished and the thinner the better if it hold working it would not be thicker then a shilling being of a foot Diameter It is called the Reet or Rete that is the Net because it must be pierced through and made like unto a Net or Lettess that the lincaments of the Mater may be perceived through it If we had a transparent metall much labour might here be saved A clear Lanthorn horn may serve for a smal Instrument but for large Instruments it is best to have it either of fine pastboard or if you will go to the cost of metal cancelled as shall be taught 1 For the delineation of the Reet first draw your fundamenttall Circle equal to the fundamental Circle of the Mater leaving a border or Limb without of such breadth as may receive the graduations of the Circle and figures set to them which breadth may be three tenths of an inch where the Reet is a foot in Diameter draw likewise two Diameters A B and C D crossing one another in the Center E at right Angles and dividing the Circle into his four Quadrants which you shall subdivide again into 90 degr apeece as you did in the Mater 2 You shall inscribe two arches which shall represent the Semicircles of the Ecliptique which shall meet at the points C and D of the Equator and the middle points of these arches shall be found in the Diameter A B thus The Diameter A B being divided as before you were taught to divide the Diameters of the Mater number from A toward the center E 23 degr 30 min. and there make the point F for ♑ and likewise number from B toward E 23 degr 30 min. and there set the point K. for ♋ then join the points C F D in one arch and the points C K D in another arch as is taught Chap. 3 and your Ecliptique is drawn But now you must make him a narrow Limb inward toward the Center to receive the scale of his degr and the characters of the Signes And to divide him you shall do thus Number in the Axtree line A B from F inwards 90 degr there is the Pole of the arch C F D to this Pole fasten one end of your ruler having an ey-lid-hole in the edge for that purpose and carrying about the other end over the several degr of the Semicircle C A D you shall cut the arch C F D into his correspondent degrees As if you lay the ruler from C to 10 degr in the Limb toward A it shall cut the Ecliptique in ♎ 10 and so of the rest Likewise for the other Semicircle C K D find his Pole 90 degr from K toward F and A and from that Pole by like reason you shall divide the Semicircle C K D by the divisions of the Semicircle C B D. This is the best way Or you way divide the Ecliptique by a Table of Right Ascensions thus Lay your ruler from the Center E to 27 deg 54 min. in the Limb which is the Right Ascension of ♉ 0. to be counted from D towards B and the ruler shall at the same time cut the Ecliptique in ♉ 0 to which that Right Ascension belongs and so for any other deg or you may defer the dividing of the Ecliptique till you have finished and cut out the Reet and then if you set the line C D of the Reet in A B the Axtree line of the Mater the Ecliptique will lie among the
♋ at Meridies and the rest in like order Then draw another Scale without this upon the Ring consisting of two spaces In the inner space shall be the Dayes of the Year in the outer space which must be a little larger shall be the Names of the moneths in their order And to divide this Scale rightly you shall do thus Go to some Eshemeris for the Leap Year that next comes viz. 1660 or rather for some Leap Year about 20 Years hence that your Scale may serve without any Prosthapheresis for 40 Years to come without sensible error and beginning your year with March look where the Sun was on the 29 of February at Noon which you shall find to be ♓ 20 degr 47 min for the Year 1660. Therefore laying the Label or a Ruler from the center to ♓ 20 degr 47 min. in the inner Scale strike a long stroke through your outward Scale and from thence begin your Year writing from thence toward the right hand March 1660. Then lay the Label to ♓ 21 degr 47 min which is the Suns place on the first day of March at noon the same year and where it cuts the outer Scale mark the first day of March and so the rest in order And to the first day of every moneth you shall set his proper Letter which belongs to him in the Calender as to the first of March you shall set D and to the first of April G c. and when you have done December you must take the Suns place for January and February out of the next years Ephemeris viz. 1661 and note that the space for the last day of the year Febr. 28 will fall out to be less by a fourth part then the rest by reason that the Sun wants almost 6 hours to finish his Circle which he finishes in dayes 365 5 hours 48 minutes And for this cause these Scales will serve you to find the Suns place at noon for any day in a like year that is every fourth year accounted hence either backwards or forwards which year shall evermore be accounted to begin from Febr. 29. and may be accounted the first year after Leap year because the Intercalation was February 25 next before Then for the year next following viz 1661. beginning March 1 and being second from the Bissextile or Leap year these Scales shall give you the place of the Sun at six hours after noon and the third year from Bissextile 1662 beginning as before March 1 these Scales shall give you the Suns place 12 hours after noon or the midnight following And the fourth year 1663 being Bissextile these Scales shew the place of the Sun at 18 hours after noon the next year 1664 being the first after Bissextile and beginning as aforesaid March 1 is the very same year for which your Scale is made and gon for that year your Scale shewes the Suns place at noon again But because the Julian years are bigger then the true Solar years by almost 12 mi. of time that is near a quarter of an hour in which time the Sun moves 27 sec 13 thirds 37 fourths therefore when you have found the Suns place by the former Scale any year after 1660 look how many years are passed since 1660 and so many times you must add 27 sec 13 thirds 37 fourths that is almost half a minute to the Suns place found and for years past ●ou must subtract as much that you may find the Suns place exactly This Prosthapheresis in 2 or 3 years is scarce considerable in an Instrument but in 10 years there will be 4 minutes 32. seconds and in 20 years 9. minutes 5. seconds to be added after 1660. and as much to be subtracted in like number of years preceding the year 1660. to which this Scale is supposed to be framed This Ephemeris or Calender M. Blagrave would have on the back-side where hee would also have a Ruler with Sights to take the Altitude of the Sun or Stars But this will be found incommodious in many respects both in the framing and in the using and therefore I advise that nothing be set on the back-side but the Tables of the Prime Epact and Cycle of the Sun thereby to find the age of the Moon her Conjunctions and Oppositions and the moveable Feasts for ever Of which see Chap. 11. CHAP. X. Of the Label and Sights THe Label is a Ruler slit in the midest and the half of it cut away to the Head where it is pinned to turn upon the Center and reaching to the outside of the Limb. The Fiducial edge thereof which pointeth upon the Center must be graduated like to the semidiameters of the Mater and Reet into 90 degrees to be numbred either inward or outward The fashion of it may be understood by the figure without more words To this Label you may fit Sights either fixed or moveable as you like best for observing Altitudes and Azimuths but for taking Azimuths you had need have one tall Sight at least half as long as the Label and then it had need be moveable to take off at pleasure For taking the Altitude of the Sun I have made a pair of moveable Sights to slip up and down upon the edge of the Planisphear having on the backside springing plates of brass to pintch them close and make them stick where you set them These are commonly to be set at C and D the ends of the Equinoctial line At A in the Limb and in the Circle next unto the inner edge which boundeth the strokes of the severall degrees you shall drill a small hole through which you may put a thred to hang a plummet on The Sun then shining through the Sights placed at C and D the plumb-line shall shew his Altitude in the semicircle B C A you beginning to number from B and observing where the plumb-line crosseth the Circle in which the hole for hanging the plumb-line was made And here you must remember that because the plumb-line falleth not from the Center of the Planisphear but from a point in the circumference about A therefore the space of two degrees must be taken but one degree so that if the Plumb-line fall 20 degr below B toward C the Suns Altitude is 10 degrees as you may see demonstrated Euclid 3.20 and Pitisc Trigonem 1.53 And thus you may observe the Suns Altitude neer the Horizon as exactly as by a Quadrant whose semediameter were equal to the diameter of your Planisphear But if the Altitude exceed 30 or 40. degrees then will the Plumb-line cut the limb too slope and have too much play to your trouble For remedy whereof you shall remove the Sight at D towards A some degrees as for example 60 degrees by which means you shall abate the Suns Altitude 30 degrees which 30 degrees must be added to the Altitude observed as for example the Sights are placed one at C the other 60 degrees above D toward A and the
the arch of the Ecliptick from the Ascendant to the Midheaven and his match taken so many degrees on the other side the Center gives the other arch of the Ecliptick from the Midheaven to the Descendant The rest of the Meridians and the Parallels are in this Mode of no use The Almicanters and Azimuth of the Reet here shew you the Altitude and Azimuth of every degree of the Ecliptick at one view CHAP. II Of the Equinoctial Projection shewing the Northern or Southern Hemisphears THe Equinoctial Projection representeth the Northern or Southern Hemisphear projected upon the plain of the Equator Here the Limb or outmost Circles of the Mater and Reet are Equator The eye-point is the North or South Pole which you will by turns Which Poles are here expressed on the Center of the Equator because the Sphear is pictured on a plain or flat The Axtree line of the Mater A B is Colurus Equinoctiorum the Diameter C D crossing him is Colurus Solstitiorum But contrary on the Reet the Axletree is Colurus Solstitiorum and the Finiter Colurus Equinoctiorum The Colurus Solstitiorum on the Mater is also the Meridian of your place and therefore is marked with Septentrio and Meridies and the ends of the Axtree with Oriens and Occidens The rest of the Meridians being all straight lines meeting in the Poles or Center are casily supplyed by the Label and so may the Parallels also being Concentrick with the Equator For if you lay the Label on the 15. degree in the Limb from Meridies toward Occidens the fiduciall edge of the Label there designeth the 15 Meridian or the One a clock line the North Quadrant of the said Meridian proceeding from the Center now the North Pole outward to the Limb or Equinoctial and the South Quadrant returning in the same line from the Equinoctial to the Center now the South Pole and if you remove the Label 180 degrees from One a clock of the day there it shall designe One a clock at night made by the other Semicircle of the same Meridian which joyneth with his match in the Center without any angle that is into the same straight line and so of the rest And for the Parallels if you set the point of your Compass or a needles point in the 23. degree ½ of the Label and turn about the Label with the point it shall describe a Circle which will serve for both the Tropicks and so may you make any other of the parallels I do not advise you to draw the Meridians and Parallels in this form least you cumber your Instrument but I shew you how you may represent any of them in a moment when ocasion requireth The Meridians of the Mater that were so called in the Meridional Projection are here turned into the severall Horizons of the World And the Parallels here serve only to graduate those Horizons Out of these Horizons choose your own Horizon and distinguish him if you will that you may readily find him when you shall looke for him Your Horizon is thus inquired Because the Elevation of the Pole at Northampton is 52. degrees 15. minutes therefore from the Center now North Pole number in the Meridian line Northward 52. degrees 15. minutes and there cutteth the the North Semicircle of our Horizon or there you may Imagine him between the 52 and 53 Horizons and the Southern Semicircle thereof lies 52 degrees 15 minutes on the other side the Center towards Meridies This may seeme strange that the North and South points of the Horizon which in the Sphear are unequally distant from the North Pole viz. the one but 51. degrees 15. minutes and the other 127. degrees 45. minutes the supplement thereof should be equally distant in this Projection But the reason is because the Center is both North and South Pole here at pleasure and the Northern and Southern Hemisphears are both here represented by turns Carry this in your head and then lay the Eabel upon the South part of the Meridian and number thereon from the Center now North Pole outward to the Equator at the Limb 90. degrees thence number backward toward the Center now the South Pole the Elevation of the Equator which is always complement of the Elevation of the Pole and is here 37. degrees 45 minutes there is the Southern point of the Horizon and is distant from the Center now South Pole onely 52 degrees 15 minutes but from the Center being North Pole 127. degrees 45. minutes and from the Northern point of the Horizon before found just 180. degrees as it is in the Sphear Having found the North arch of your Horizon 52. degr 15. min. behind the Center count as many degrees and minutes forward in the Meridian before the Center toward Meridies and the arch crossing there shall be his match to make up the whole Circle and so may you find your whole Horizon upon the Mater whatsoever your Latitude be Here you must remember that Stars which have Northern Declination rise and set upon the Northern arch of the Horizon and those which have Southern declination upon the Southern arch Remember also that many Stars between the Tropicks which have Northern Latitude have nevertheless Southern Declination and contrary many which have Southern Latitude have Northern Declination The lineaments of the Reet serving you in this Projection are onely the Ecliptick and the fixed Stars the Almicanters and Azimuths here are of no use The Meridians and Parallels are supplyed by the Label for the Reet as well as for the Mater And whereas the Ecliptick here seemes to be irregular seeing the Solstitial points of Cancer and Caprcorn are not distant 180 degrees as they should be you must imagine that the Southern arch of the Ecliptick is Projected by the eye placed in the North Pole and for the Northern arch the eyes place in the South Pole and the Center serveth for both the Poles alike as hath been shewed number therefore as you were taught for the Horizon in this Projection For the reason of the draught of the Horizon and of the Ecliptick in this Projection is the same CHAP. III. Of the Nonagesimal Projection shewing the Eastern and Western parts of the Sphear being divided by the Azimuth of the Nonagesimus gradus NUmber in the Limb from the Equinoctial line toward the Pole the Altitude of the Nonagesimus gradus which is the highest degree of the Ecliptick and thereto set the Finitor turning the Almicanters either to the North or to the South as your work proposed shall require Now is the Finiter Ecliptick his point at the Limb-is Nonagesimus gradus The Center of the Planisphear is Ascendant and Descendant the East and west points of the Horizon are here distant from the Center as much as the Amplitude of the Ascendant cometh to to be counted from the Center upon the Eqinoctial line of the Mater which here stands for Horizon the Meridians and Parallels of the Mater are here
follow this Azimuth to the Finitor there is Nonagesimus gradus and the Altitude thereof 42 degrees counted from the Limb here Horizon the Azimuth thereof lies in the Limb between the Finitor and the Meridian 36 ⅓ as before equal to the Amplitude of the Ascendent I number also from ♓ 25 ½ in the Meridian 23. 41 minutes to the left hand still and there I have ♈ 19. 11 minutes the Suns place which cuts on the Label 41 ⅔ for the Altitude of the Sun there and the Label at the same time cutteth in the Limb about 29. from South East-ward for the Azimuth of the Sun and after the same manner you have before you the Altitude and Azimuth of every other degree of the Ecliptique for the time proposed CHAP. LVIII To do the same by the Nonagesimal Projection if the Altitude of Nonagesimus gradus be first given instead of the Altitude of Culmen Caeli SEt your Planisphear in the Nonagesimal Projection by Book 2.3 that is make the Limb now to represent the Circle of Longitude or Azimuth for it is both which cutteth the Nonagesimus gradus and make the Equinoctial line here to be Horizon and from the Equinectial line number in the Limb the Altitude of Nonagesimus gradus and thereto set the Finitor so shall the Finitor be Ecliptique the Nonagesimus gradus at the Limb the Ascendent and Descendent at the Center and because the Equinoctial line is Horizon in this Projection therefore the Meridians become Azimuths and the Parallels Almicantars shewing the Altitude and Azimuth of every degree of the Ecliptique if you reckon as you ought in this manner Reckon in the Equinoctial line here Horizon from the Center the Amplitude of the Ascendent to the right Hand if it be a North Signe and contrarily if it be a South Signe Where this Amplitude ends is the East point from whence you shall reckon all your Azimuths Count thence to the Limb and back again if need be in the said Equinoctial line till you have made 90 degrees there is your Meridian as far distant from the Limb as the East point was from the Ascendent Follow this Meridian to the Finitor and there he shewes you Culmen Caeli and the Parallel there cutting shewes the Altitude thereof Now may you find every degree of the Ecliptique above the Horizon if you know but what Ascends or Descends or Culminates and of every such degree the Parallels shew you the Altitude and the Meridians shew his Azimuth if you begin your numbring from the East or South Azimuth Example When ♋ 24 degrees was Ascending as in the Example before used as by consequence ♈ 24. in Nonagisimo gradu ♂ was in ♉ 4. 45 minutes and had but 3. or 4. minutes South Latitude I would know ♂ his Altitude and Azimuth setting go the Finitor above the Equinoctial line 42 degrees which is the Altitude of Nonagesimus gradus I say because the Nonagesimus gradus at the end of the Finitor in the Limb is ♈ 24. therefore I must count back 10. 45 minutes toward the Ascendent for Mars and there the Parallel 41 degrees with 10 minutes cutteth the Finitor for the Altitude of ♂ and the 14th Meridian East-ward from the Limb gives me his Azimuth which if I begin to reckon from the East point falleth out to be almost the 40th Azimuth from the East Mars his Latitude here is not regarded CHAP. LIX The Nonagesimus gradus and his Altitude and Azimuth given as in the former Chapter How in the same Projection to get the Altitude and Azimuth of any Planet or Star by his Longitude and Latitude YOur Palnisphear set as in the former Chapter you shall number the Longitude of the Star upon the Finitor here Ecliptique beginning at the Descendent or Nonagesimus gardus and in the Azimuth serving his Longitude count his Latitude by the Almicantars at the end of which account is the Stars place for this time The Parallel cutting there shewes his Altitude and the Meridian cutting there shewes his Azimuth if you count from the East point as you were taught in the former Chapter Example Lucida Pleiadum was in Longitude ♉ 25. 10 minutes Latitude 4 degrees 00 minutes North. Therefore from the Nonagesimus gradus ♈ 24. I number in the Finitor toward the Ascendent 31. 10 minutes and there is the Longitude of Lucida Pleiaedum in the Azimuth that cuts here I go up Northward 4 degrees and there I make a prick for Lucida Pleiadum Now the Parallel 38 ½ shewes me his Altitude and the 48th ½ Meridian from the Center shewes me that Lucida Pleiadum is gone 48 ½ in Azimuth from the Ascendent but from the East point onely 12 degrees 10 minutes CHAP. LX. The Altitude and Azimuth of any Star taken and either the Ascendent Nonagesimus gradus or Culmen Caeli known How by the same Nonagesimal Projection to find the Stars Longitude and Latitude IF you know either the Ascendent Nonagesimus gradus or Culmen Caeli you have enough to put your Planisphear in the Nonagesimal Projection by the former Chapters And your Planisphear so set you shall seek out the Meridian which standeth for the Azimuth in which you observe the Star and therein number from the Equinoctial line the Altitude observed the Azimuth and Almicantar cutting there shew the Longitude and Latitude of the Star inquired If the Azimuths reach not the place of the Star turn the Reet half round and let the Zenith and Nadir points change places and your turn is served Example Febr. 13 1657 8. I observed somewhat near that ♃ was gone West-ward from the Meridian in Azimuth 14 degrees and that his Altitude was 61 degrees Sirius was then in the Meridian by which I have the Ascendent Culmen and Nonagesimus gradus any or all of them given For when in the Equinoctial Projection I bring Sirius to the Meridian line it is all one as if I had set the Suns place to the hour of the Night by Chapter 46. and I see there Culminates with Sirius ♋ 7. 10 minutes whose Meridian Altitude by the 46. is 61. 5 minutes and I see ♎ 5 ½ ascending in my Horizon and ♈ 5 ½ descending therefore ♋ 5 ½ is Nonagesimus gradus which is 90 degrees distant both from the Ascendent and Descendent his Altitude by Chapter 55. 61. 10 minutes almost Therefore I set the Finitor 61. 10 minutes above Meridies as Chapter 58. and in the Finitor at the Limb I count ♋ 5 ½ Nonagesimus gradus thence I go inwards in the Finitor 1. 40 minutes where I come to ♋ 7. 10. the degree of Culmination this degree is cut by the 4th Meridian from the Limb whereby I learn that this 4th Meridian will be the Meridian of my place and that the Amplitude of the Nonagesimus gradus and likewise of the Ascendent is 4 degrees Now to place ♃ in the Mater I count his Azimuth first beginning from the Meridian of my
being placed upon the sole of the Window shall supply the use of the Nodus in the Gnomon and the beams of the Sun being Reflected by this Glass or Water shall shew the Hours upon the Ceeling The Planisphear shall help you to make this Dyal two wayes If the Window Decline not much from the South you may make it most easily the First way But if it Decline much and so the lines fall much upon the partition Walls or if you would adorn this Dyal with the Parallels or other Circles you shall use the Second way The First way is this Draw a Meridian line upon the Floor by Book 4.3 so that it may point upon the Perpendicular which you shall imagine to fall from the Nodus upon the plain of the Floor prolonged And this may be most easily done if you hang a Plumb-line in the Window dnecuy over the Nodus of place of the Glais for the shadow which that Plumb-line gives upon the Floor at Noon is the Meridian line sought and by a Ruler or a line stretched upon it you may prolong it as far as you shall need Then let a Plumb line fall from the Ceeling upon this Meridian line of the Floor and behind it Northward or Southward place your Ey so that the Plumb-line may hide the Meridian line of the Floor from your Ey then keeping your head steddy cast you Ey up to the Ceeling and direct One to make two points at a good distance in the line upon the Ceeling which the Plumb-line now covereth from your Ey and by these points you shall draw a straight Meridian on the Ceeling Then having fastned one end of a Line at Nodus let Another stretch this line up to the Meridian on the Ceeling and let him move his hand nearer or further in the Meridian till you find by a Quadrant that this line pointeth up Northward as many degrees as the Elevation of the Equator is in your Country and then you shall cause him to make a point where the line toucheth the Meridian of the Cieling and through that point you shall draw the Equinoctial line of your Dyal cutting the said Meridian at Right angles The length of the thred from the Nodus to the point in the Meridian where the Equinoctial cuts him is Radius of the Equinoctial to that Radius you shall find the Tangents of 15 30 45 60 75. as you found the Co-tangents Chapter 27. knowing that the Co-tangents of 80 and 70. be the Tangents of 10 and 20 and so of the rest and beginning in the Meridian make pricks in the Equinoctial line at the end of the Tangent of 15. Eastward for 1. and Westward for 11. and at the end of the Tangent of 30. prick Eastward 2. and Westward 10. c. Then by Chapter 9. seek what angles the Hour lines of a Vertical Dyal make at the Center which in our Latitude are 1.11.58 minutes 2.24.32 minutes 3.38.20 minutes 4.53.52 minutes 5.71.17 minutes and with the Complements of these angles shall these Hour lines cross the Equinoctial so the Hour line of 1. shall Incline to the Meridian on the South side the Equinoctial line and shall make his lesser angle with the Equinoctial 78.02 minutes and the rest as in the Figure The Second way is this Fit a plain smooth Board about a foot Square to lie level from the fole of the Window inwards and near the outer edge thereof make a Center in the board in the very place of Nodus or a little under it remembring that the Nodus or Center of the Glass must be set so much higher then this board as the Center of your Quadrant is placed higher in the Projecting of the Dyal Upon that Center taken in the board describe as much of a Circle as you may with the Semidiameter of your Quadrant which Circle shall be Horizon Draw here from the Center to the Horizon inwards a Meridian line by Book 4.3 and where it cuts the Horizon begin to graduate the Horizon into degrees of Azimuths both wayes which you may speedily do by transferring the graduations of your Quadrant or so much as you shall need to this Horizon Next you must devise to make your Quadrant stand firm and upright upon one of his straight sides which I will call his foot for this time and that you may thus do Take a short peece of a Ruler or sinal Transom and saw in one side of it a notch Perperdicularly in which notch you may stick fast or wedge the heel or the toe of your Quadrant in such sort that his foot may come close to the board and the other straight side or leg may stand Perpendicular upon it Those things prepared put your Planisphear in the Meridional Projection with the Finitor at your Latitude and first observe there the Altitudes of the Sun in the Meridian which in Latitude 52.15 minutes you shall find in the Tropique of ♋ 61.15 minutes in the Equator 37.45 minutes and in the Tropique of ♑ 14.15 minutes Now having stuck a short needle in the Center of the Horizon close to which you must alwayes keep the Center of your Quadrant set the foot of your Quadrant in the Meridian line of the Board and from the Center of your Quadrant extend a thred by 14.15 minutes of Altitude straight on to the Cieling the thred only touching the plain of the Quadrant and making no angle with it but held Parallel and where the thred thus extended touches the Cieling make a point then the Quadrant unmoved extend the thred by 61.15 minutes of Altitude and make another point as before and between these two points draw a straight line and that shall be your Meridian and shall be long enough for your use then extend the thred by 37.45 minutes of Altitude and where it touches this Meridian cross the Meridian at Right angles with an infinite line which shall be the Equator Then seek upon your Planisphear for one a clock and you shall find in the Tropique of ♑ the Suns Azimuth 14. and his Altitude 13.06 In the Tropique of ♋ his Azimuth 27½ and his Altitude 59.04 minutes therefore setting the foot of the Quadrant in the Azimuth 14. from the Meridian Eastward I extend the thred by 13.06 of Altitude and make a prick in the Cieling and again setting the foot of the Quadrant in Azimuth 27 ½ and extending the thred by 59.04 minutes of Altitude I make another prick in the Cieling and the straight line which I shall draw between these two pricks shall be all the Hourlines of One and so of the rest And if you be minded to have the other Parallels drawn you may find points for them as you have done for the Tropiques and by those points draw them And note that two points made in the Cieling for the same Hour line in any two Parailels or in the Equator and any Parallel shall suffice to direct the line though it is best
and Mars in twain Sets forward and comes round again Then in one Year the Sun displaies Three hundred sixty and five dayes And near a quarter which in four Encompassings makes one day more Between the Sun and us there fly Fair Venus and swift Mercury These alwayes near the Sun we find Not far before nor far behind The Moon 's the lowest who in seven And twenty dayes goes round the Heaven And above two dayes more do run Before she overtakes the Sun So twenty nine and an half in all Do make a Moneth Synodical These Planets make their course to th' East Though they be faster hurled West And six degrees the rest may stray Beside the Suns Ecliptique way The Circles of the Sphear SIx greater Circles mark you shall Which equally divide this Ball. Just in the midst between the Poles From East to West th' Equator rolles Th' Ecliptique cuts him and doth slide Scarce twenty four degrees aside Horizon even with the ground From Stars below our sight doth bound Meridian upright doth rise Parting the East and Western Skies Two Colures through the Poles do run Quarrring the Circle of the Sun One where the Spring and Fall begin Th' other where longest dayes come in Four lesser Circles mark them well Are to th' Equator Parallel Two Tropiques bound the Suns high way Shewing the Long'st and Shortest day The Arctique Circle curs the Beares Th' Antarctique opposite appeares Meridians half twenty four For Hours and for Degrees ninescore Through both the Poles o th World do pass And th' Equinoctial down right cross And ninescore Parallels hath that line By which Stars North and South decline Th' Ecliptique hath his Longitudes And Parallels of Latitudes For Stars but in Geography The Towns beside th' Equator lie Over our Head and under Feet The ninescore Azimuths do meet And here as many Parallels Of Altitude Horizon tells Longitudes and Meridians all And Azimuths great Circles call But all their Parallels in Heaven Being lesser cut the Globe uneven Degrees three hundred and threescore Hath every Circle and no more When I consider thy Heavens the work of thy Fingers the Moon and the Stars which thou hast ordained What is Man that thou art mindfull of him Or the Son of Man that thou visitest him Ps 8. Errata Some Faults have been committed between the Writer and the Printer the cheif whereof the Reader is desired to amend as followeth pag. and line Faults Amendments 2 3 4. c. to pag. 30. in the Title The first Book of the Fabrique of the Planisphere The first Book Of the Fabrique of the Planisphear 31 and 32. in the Title The second Book of the Projections of the Sphear The second Book Of the Projections of the Sphere 1. 13. mossie massie 2. 7. Declination Delineation 3. ant Declination Delineation 4. 16. look up look upon 4. 36. eye beam eye-beame 5. 13. Euclid 4 5. Euclid 4.5 22. required of your Compass over reach required If your Compass reach short 5. 23. if it reach short if it over-reach 6. 39. structures structure 8. secant 67. 25693. 25593.   The 5. last Tangents want a place You must add a Cypher to each of them 9. 16. two so 12. 18. all but all But 13. 07. working it working It 16. 19. foure fewer 17. 18. Alamath Alamach 21. Henerichus Heniochus 17. antop little rain little Waine 18. 8. brow Crowne 18. 30. Praecepe Praesepe 19. 16. Bedalgieure Bedalgieuze 23. Alhaber Alhabor 20. 6. round the inner circle or edge of this Ring it must round The inner circle or edge of this Ring must 20. 14. naile screwes male screwes 17. small screwes female screwes 19. bare beare 22. 30. is made and gon for that year your scale is made And so for that year your scale 24. 9. but one degree but for one degree 25. 7.   put out the marks of Parenthesis 26. 8 year Henr. 3. year of Henr 3. 23. Periodus Periodus 28. alwayes upon alwayes upon 35. thus set thus set 28. 1. and 5. Grostons Grastons 30. 3 second Meridional second or the Meridional 33 6. set for London namely for London 33. ●1 on Elevation no Elevation 34. ●● 〈◊〉 the which the 9. Azimuth Azimuthes 37. 6. the eyes place the eye is placed 41. 3. Center B A Center B A 48. 4. either way either way 22. A C C A 50. 16. Zenith of Zenith of 32. Zenith and B Zenith A and B 53. 12. 12 and 13 number 12th and 13th numbred 56. 8. these sides the sides 20. sub●endeth A which sub●endeth A 62. 17. fall falls 63. 7 9. wayes rayes ult of deleatur 64. 10. min. at 70 min. and at 70 11. between 8 degr 34. min. between 18 and 24 min. 12. Here Refraction is as the Sun Her Refraction is as the Sun 's 65 1. your Meridians your Meridian 66. 30. require enquire 67. 3. Michals Michaels 68. 39. Long long 73. 6 CHAP. II CHAP XI 74. 20. Alrucabe Alrucaba 75. 8. Alrucabe Alrucaba 75. 12. first made first mode 76. 29. prick here prick here 8● 16 17. by Declin by their Declin 82. 12. her Declin his Declin antep sta Star 86. 16 17 18 19. Pleiades Riseth setteth Pleiades Rise set 86. 30. to be least to be lost 87. 〈◊〉 〈◊〉 〈◊〉 〈◊〉 〈◊〉 〈◊〉 〈◊〉 〈◊〉 〈◊〉 〈◊〉 88. 4. could happen could not happen ● 14. note know 17. Asera Asera 91. ●1 Duet Deut. 99. 21. 23 degrees 23d degree 102. 6 and 30. Eniph Alph. Eniph Alph. 23. 35 ⅓ 56 ⅓ 105. 8. Stars I Stars I ● Caeti Ceti 19. 120 deg 125 degr 110. pen. by Oblique Problemes by Probl 2 Obliqu 111. 25. in 39 ½ in all 39 ½ 114. 17. grees setting grees Setting 11. Houses also Houses also 31. 49 30 50 51. 118. 6 7. 49 50 50 51. 24. and so and to 119. 1 Astrologers Astrologie 17. futurus futurus 122. 29. no man no men 123. 3. princeps Nero princeps Nero 4. citherae citharae 10. dereliquit Nero dereliquit Nero 12. persuesum persuasum 27. se nore temerè 128. 26. as by and by 29. setting go setting therefore 130. 34. Jupiter in that Meridian Iupiter In that Meridian 139. 6. Christ time Christs time 17. Ticius Tacitus 141. 6. 4 5. 11. 4. 5 11. 145. 13. Suns Dyals Sun Dials 147. 5. or Equinoctial deleatur 19. so the hour lines to the hour-lines 154. in the scheam the letter I is wanting at the lower end of the hour-hour-line of 11.   157. 17. with an extension with any extension 174. 32. precrucem per crucem 176. 11. by the arch by R T the arch 180. 9. Declination plain declining plain 181. 20. pre per 184. 27. the Vertical of my Dial and also deleatur 185. 28. and so and to 188. 9. Tumiture furniture 190. 7. you use you may use 192. in the scheme the prickt line last save one should be put out   193. an t a Vertical plain a Vertical or a South Horizontal