consequence will go off naturally of it self when the Quicksilver rises a too moist Air has stranger Effects on Men's Bodies than is generally taken notice of by them that understand not the Reason from whence it proceeds In the next place observe That as the Baroscope Predicts only fair and foul Weather so that you may be the better directed which of these to expect you must still note the rising and falling of the Mercury for its rising in any part of the Glass betokens a tendency to fair as its falling down foreshews an inclination to Rain and Wet As for the Words engraven on the upper part of the Register Plats they are then only to be noted when the Mercury removes from Changeable upwards and those on the lower part are to be noted only when the Quicksilver falls from Changeable downward In other Cases the Words are of no Use for if it is Rising in any part foreshews a Tendency to be Fair and its Falling in any part a Tendency to foul Weather then it follows that if it fall from settled Fair to Fair it may yet Rain a little though the Quicksilver still stands as high as Fair the like may be said if it rise from the Word much Rain to Rain for though its Rising betoken a Tendency to Fair yet since 't is still so low as the Word Rain there may be yet be some Wet Weather though not so much as there was before the Quick-silver began to rise But if the Mercury mount upwards from Changeable then will the Weather for the most part be such as the Words in the upper part of the Register Plates Import and if from Changeable it falls down the Weather likewise will be much the same as the Words found in that Part do express but in the Mercuries rising up to Changeable when 't is below it or falling when 't is above it the Words as I said before signifie nothing If the Mercury rises very high the Weather will continue Fair so long as it stands at that pitch and you will not find the Weather change much till the Mercury falls down a good Space lower So likewise when 't is fallen down very low you must expect Wet Weather during all the time of its so continuing in both these Particulars you will be certain provided the Wind and the Moon Concur For both the Wind and the Changes of the Moon are to be well observed in order to make the truer Prediction And first for the Wind this is found to be of very great Moment for if the Glass fall and the Wind sit in those Quarters from whence much Rain is observed usually to come as with us about London are the South and Southwest then 't is not to be doubted but Wet will follow On the contrary if the Glass rise when the Wind blows from a dry Quarter of the Heavens as with us are the North and East then 't is a hundred to one but the Weather will be Fair but if the Glass rises and the Wind be South the Case is doubtful So also if it falls and the Wind be North for then it often happens that the Weather does not prove always such as the Rising and Falling of the Glass Predicts As to the Moon 't is well observed That the Weather is generally inclinable to Moisture about three Days before and three Days after both the New and Full Moon if therefore the Glass Falls the Wind be South and the Moon near the New or Full the certainty of Rain is still much the greater If the Mercury be high in the Summer-time when the Weather is hot and does of a suddain fall down a pretty considerable Distance then certainly expect great and sudden Storms of Rain and Thunder to follow soon after VVhen the Glass is Risen very high in Winter and the Wind sits then North and East it certainly presages Frost to ensue and the same will continue as long as the Mercury stands thus High but when you see it begin to sink somewhat considerably then be assured a Thaw will quickly follow If in a Frost the Air becomes Overcast and the Quicksilver Rises of a suddain yet higher when it had stood high for a time before then look for Snow for the Cold above which is the Cause of Snow causes also the Air to become more heavy by Condensatition If the Glass Rise and Fall but a little or it be unsettled in its Motion it then argues an unconstant Season and the Weather will not then long continue in one state the like happens when it is about the Word Changeable or Uncertain for then no true Guess can be made what the VVeather will be The Mercury is always observed to be lowest in extream high and strong Winds that happen when the Air is full of Moisture but the Glass does no way predict Winds before-hand for the extreme lowness of the Quick-silver happens only at the very Time the Wind Blows and as soon as the Wind Ceases the Mercury is then found to rise apace but such a Rise that immediately follows Storms are no signs of fair Weather except it rises much higher than it was at the Time of the Wind 's beginning to blow Note That when Wet is predicted by the Glass or by any other Sign or Token it generally begins to rain either when the Moon is due South or else when the Sun comes to be upon the same Quarter from whence the Wind blows and if it rains not at the Time of the Moon 's Southing or Northing nor when the Sun and the Wind comes together then 't will hardly rain till the same Times do again return which is a good Note in time of Harvest and very seldom fails though it sometimes may Note also that most great Changes of the Weather happen with us either at the New full Moon and if the Weather change not then 't will hold on as it is till the next New or Full Moon comes Frost generally breaks at the Changes when it does break and 't is commonly at the Change or Full that Rain comes after a dry Season has long continued An Addition of some Natural Predictions of Fair and Foul Weather And first of Fair Weather THe much hooping of Owls after Sun-set in the Summer-time and in the Night also foreshews a fair Day to follow Swarms of little Gnats and Flies sporting themselves together in the Evening is a certain token that the Day following will be fair If the Sun set red in the Evening and the Place be free from Clouds and the next Morning rises clear and bright these are good tokens that the Day will be fair The Soaring of Kites aloft in the Air is a Sign of dry and hot Weather When the Bat Mice are seen to fly to and fro in the Evening it shews that the next will be a fair Day If in the Morning Mists descend from the Hills and settle in the Vallies 't is a Sign that the
Day will be fair If it rain in the Summer and Horses and Kine do thereupon leave off Feeding 't is a certain Sign the Rain will not continue long Crows if they caw or cry early in the Morning with a loud and clear Voice it shews that the Day will be fair Signs of Rain and Wet Weather IF in the Evening the Sun set behind a dark black Cloud and her Body appear also greater at that Time than usual it certainly betokens Wet the next Day If Water-fowl wash themselves much and dive more than usual under Water and also flutter and clap their Wings and oil their Feathers more than usual 't is a Sign of Rain If Toads are in the Evening found leaping in the Paths or High Ways or if the great black Houseless Snails are found creeping about more than usual it foreshews Rain An unusual Circle of Light about the Moon or Stars when no Mist or Fog appears below is a Sign of Rain soon to follow If the Sun at her first rising or some Time after shine waterish that is paler than ordinary 't is a Sign of a wet Day especially if the Air be soon after obscured with thick Clouds If in the Summer in a fair clear Day you perceive the Clouds to gather of a suddain on all Sides and appear black and curled then prepare your self for Storms of Rain and Thunder soon after Hoggs crying in an unusual manner and running unquietly up and down with Litter in their Mouths foreshews Rain and Storms at Hand If Crows cry much in the Evening 't is a Sign of Rain the next Day Any of these or the like Signs happening in the Summer time will if the Baroscope concur help you to make the more certain Guess at what Weather will after ensue especially if the Glass be at Changeable and Uncertain for then by these you may the better guess at what Weather will follow Some particular Places have also Signs of Rain and fair Weather which others have not which observed together with the Glass may make your Guess more certain than they can otherwise be the Nature of Countries also differ for whereas in England especially near London and the Southern Parts a South Wind always brings most Rain and a North or East Wind dry Weather on the contrary at Edenburgh it Scotland a South Wind brings the fairest Weather and a North or North East the greatest Wet these things considered every Man that lives in Countries which differ in Temper from that for which these Rules serve ought to frame Rules to himself by observing the Changes that follow the Glass's Rising and Falling the Change of the Wind and the Southing of the Moon Note If the latter End of February and the Beginning of March be constantly Dry it betokens a very Dry Summer Also a hard Frostly and Snowy Winter makes the Year following to be very Plentiful and Healthy but a Warm and Moist Winter makes the Summer after to be very sickly Some Uses of the Spirit Weather-Glass THE suddain Rising of the Spirit in the Day in Summer foreshews an immediate Approach of Thunder and Storms of Rain and in Winter Snow If it rises much in the Day and falls but little in the Night then expect the Day following excessive Heat if not Thunder and Storms If it rises never so little in the Night-time expect next Day either Rain or Snow as the Season is If it rises no more in the Day than it falls in the Night 't is a Token that the Air is Temperate as to the Heat and Cold. If it falls in the Day-time and the Weather be fair expect a Frost the next Night The like happens also generally when the Liquor is very low The more it rises or falls at any Time the more remarkable will that Change of Weather be which follows All the other Uses of it are only to shew the present Temper of the Air as to Heat and Cold and farther than this my Experience has not as yet led me neither by Enquiry do I find any other useful Observations made on them I shall only add That these Glasses might be made as strong as the Tube of a Quick-silver Weather glass provided the Ball be proportionable to the Bore only It may be if the Glass were thicker they would not move so nicely but this would not signify much because little Judgment can be made from small and little Alterations JUst when the last Sheet was ready to be printed off that which follows was communicated to me by Mr Watson the Person before-mentioned in this Work which in respect of its Nature being not only plain and useful but also free from all Objections that Tables may be liable to I have thought fit to add it hereunto upon his Recommendation and in the Words penn'd by himself SIR I Rather communicate this to you because many Gentlemen have the Convenience of Places fit for this way of Observation which I take to be the most exact Way yet found to adjust a Pendulum Clock well If you think it may be serviceable to those that are the most exact and curious in Time-keeping you may do well to insert it in that laborious and curious Tract of the Equation of Natural Days that you are now publishing I am Your real Friend and humble Servant S. W. The Way of finding how much a Pendulum Clock has gained or lost in a Day Week or a Month to the nicity of Two or Three Seconds c. N. h. ′ ″ 1 0 3 56 2 0 7 52 3 0 11 48 4 0 15 44 5 0 19 39 6 0 23 35 7 0 27 31 8 0 31 27 9 0 35 23 10 0 39 19 11 0 43 15 12 0 47 11 13 0 51 7 14 0 55 2 15 0 58 58 16 1 2 54 17 1 6 50 18 1 10 46 19 1 14 42 20 1 18 38 21 1 22 34 22 1 26 30 23 1 30 25 24 1 34 21 25 1 38 17 26 1 42 13 27 1 46 9 28 1 50 5 29 1 54 1 30 1 57 57 31 2 1 53 TAke a Piece of thin Brass and file therein a Slit or Notch about half a quarter of an Inch deep but somewhat wider at the Top than at the Bottom as thus 〈◊〉 knock the End of it into some Post in your Back-side or else in some Window that ye think convenient then look through the Notch at any Star of the first or second Magnitude and wait till the Star comes to the Edge of any Chimney or the Side of any House and you will see the Star vanish in a Moment then mark what your Clock is at when the Star vanishes Then at any other Night afterwards as the next Night or a Week or a Month afterwards wait for the same Star again till it vanish behind the Chimney or House as before and then observe what your Clock is at then your Clock should shew the second Time of vanishing so much sooner than the first as this Table shews now the farther off the Chimney or Wall is the more exact will the Observation be Let the Distance be Ten Yards at least let the Observation be made in any part of the East South or West but little towards the North Pole because the Polar Stars are not so fit for this Purpose EXAMPLE Suppose a Star vanishes this Night at Nine Hours Three Minutes and Four Seconds by my Clock and Eight Nights after I observe it again and it then vanishes at Eight Hours Thirty four Minutes and Forty two Seconds by my Clock against Eight Nights in the Table I find Thirty one Minutes Twenty seven Seconds that is so much sooner should the Star vanish at the second Observation than it did at the first therefore substracting 31′ 27″ from the first Observation 9h 3′ 4″ there 's left 8h 31′ 37″ the true Time that the Clock should have been at in the second Observation therefore seeing the Clock was then at 8h 24′ 32″ it has gained 2′ 55. FINIS
Horological Disquisitions Concerning the NATURE of TIME AND THE Reasons why all Days from Noon to Noon are not alike Twenty Four Hours long In which appears the Impossibility of a Clock's being always kept exactly true to the Sun With TABLES of EQUATION and Newer and Better RULES than any yet extant how thereby precisely to adjust ROYAL PENDULUMS and keep them afterwards as near as possible to the apparent Time With a TABLE of PENDULUMS shewing the BEATS that any Length makes in an Hour A Work very necessay for all that would understand the true way of rightly managing Clocks and Watches By JOHN SMITH C. M. To which is added The best Rules for the Ordering and Use both of the Quick-Silver and Spirit Weather-Glasses And Mr. S. Watson's Rules for adjusting a Clock by the Fixed Stars LONDON Printed for Richard Cumberland at the Angel in S. Paul ' s Church-Yard 1694. Licensed January 17. 1693 4. D. Poplar TO THE READER THE Design of these Papers is not to cover the Clock-Makers Imperfections as some have suggested but plainly to demonstrate thetrue Reason of those unavoidable Variations between the Time given by the Sun and that of a good and well-adjusted Clock and to give such Directions as may yet reduce them to a nearer Agreement in Time In doing of which I have endeavoured to express my self in such Words as I thought most proper to inform the Reader 's Understanding What is here exposed to publick View is not the Result of mere Speculation but of Skill and Practice for as it has been my Profession so it has been my Care and Concern also to understand exactly not only the Nature of a Clock but that also of its Motion and the Result of my Discoveries As to the latter you have very briefly laid down in the following Discourse and I assure you that I have not spoken any thing of the Truth of which I was not first well satisfied The Style indeed is purely Mechanick but this is no Argument against its usefulness since in Books Men ought not so much to heed who 't is that speaks as what is spoken He always writes best that from his own Knowledge and Experience can inform the World of something that 's advantagious to Human Life which was not known to Mankind in the Times before Farewel A Table of Equations Shewing the true Length of every Natural-Day or the Seconds of Time that they are either Longer or shorter than XXIV Hours By JOHN SMITH C. M.  Jan. Feb. Mar. April May June July Aug. Sept. Octo. Nov. Dec.  ′ ″ ′ ″ ′ ″ ′ ″ ′ ″ ′ ″ ′ ″ ′ ″ ′ ″ ′ ″ ′ ″ ′ ″ 1  22 D 24  17  17  3  11  7  9  20  14  9  20 2  23  2  17  16  3  11  7  9  20  14  10  30 3  23  2  18  16  1  12  7  9  21  13  10  30 4  24  4  18  15 D 24  12  6  11  21  13  10  30 5  2◠ 4  18  15 D 24  12  6  12  21  13  11  30 6  2◠ 4  18  14  1  13  6  13  21  13  12  30 7  19  5  18  14  2  13  6  13  22  13  12  30 8  18  5  18  14  2  13  5  14  22  11  13  30 9  17  6  18  14  3  13  4  14  22  10  15  30 10  16  8  18  13  3  13  4  15  21  9  17  30 11  16  8  18  13  3  13  3  15  21  8  17  33 12  16  9  18  12  4  13  2  15  20  7  18  30 13  16  9  19  12  4  13  2  16  20  7  18  30 14  16  10  19  11  5  13  1  16  20  6  19  31 15  15  10  20  11  5  13 D 24  17  20  6  20  31 16  1◠ 11  20  10  6  12 D 24  17  20  5  21  31 17  13  12  20  10  6  12  1  17  20  4  22  31 18  12  13  20  10  6  11  2  18  20  3  23  30 19  11  13  20  10  6  11  3  18  19  3  23  30 20  11  13  19  10  7  11  4  19  19  2  24  30 21  10  14  19  9  8  11  4  19  19  1  24  30 22  9  14  19  7  8  11  4  19  19 D 24  24  30 23  8  15  19  7  9  10  4  19  19 D 24  25  30 24  ◠ 15  19  7  10  10  5  19  18  1  25  30 25  5  15  19  6  10  10  5  19  17  2  25  28 26  4  15  19  5  11  10  5  20  17  2  25  23 29  ◠ 16  19  5  11  10  5  20  16  3  26  23 28  ◠ 17  19  5  11  9  6  20  16  4  26  27 29  ◠   18  4  11  9  7  20  16  6  27  27 30  1    17  4  11  8  8  20  15  7  28  25 31 D 24            9      8    24 The Character D 24 shews what Days are truly 24 Hours long the Red Figures shew the Seconds of Time that those Days on which they are plac'd are longer than 24 Hours and the Black Ones
found there the Clock will still go too slow because the Pendulum Day is longer than the Natural Day On the contrary where the red Figures are found there a well adjusted Clock will go always too fast because there the Pendulum Day is shorter than the Natural Day and by consequence is finish'd before it Now 't is plain that if a Clock be set right to the Sun the First of February it must go all the Year after too slow because the losing between that and the Fourth of May is so much that it never gains it up till the very last part of its Years going On the contrary if it be set right the Twenty third of October it will gain so much by the last of January as no Loss shall afterwards countervail but that in the very last part of its Years going between the Sixteenth of July and the Twenty first of October 'T is likewise as plain that if a Clock be set right the Fourth of May 't will then in the time of a Years going be both too fast and too slow for the gaining at first being less than the next losing it will be too slow by the Twenty first of October though 't was too fast the Fifteenth of July and the like will happen if it be set right the Seventeenth of July for the losing that follows being less than the next gaining between October 24 and January 31. it must by consequence be sometimes too fast and sometimes too slow So that as a Clock may happen to be set it may in some considerable time of going be almost half an Hour too fast or half an Hour too slow though as to its own Motion it go exact and true as it should do and for this there is no help unless you understand well the nature of Time and know when and in what manner to set the Clock so as that for some good length of time after he may so humour the Sun's motion as never to be very far distant from it but sometimes too fast a little and in a little time fall back again as it were and so come to be right therewith and then in a little time after be a little too slow Now therefore in order to the reducing of the Motion of a well adjusted Clock much nearer the time given by the Sun than as yet any known Rule will direct us I have with great Care and Pains Composed a Second Table of Equations that shews how a good and well adjusted Pendulum may be kept all the Year round within a great deal less for the most part than 3′ 45″ of the time given by the Sun or the 4th part of a quarter of an Hour which is so small a matter as not to be perceived in common business Now in the explanation of the Second Table note That the First Colume contains the Days of every Month the other Twelve Columes belong to the Twelve Months of the Year whose Names are plac'd over them the Black Figures in any part of the Columes shew where and how much a Clock in the Natural Course of its Motion according to the design of the Table will lose or go too slow the Red Figures shew in what parts of the Year and how much in Minutes and Seconds of Time the Clock will go too fast As for the Days on which you find this Character ☉ those Days I call Rectifying Days because on them the Clock is still to be new set in order to keep it the better within the Limits design'd by the Table The Table thus explain'd I shall come now to shew you the Uses that may be made thereof And first I will shew you how by the Table also as well as by the first a Clock maybe adjusted now to do this Let this Clock be set to the Sun on any Day that is not a Rectifying Day observing this always to set it so much too fast as the Red or too slow as the Black Figures do express and then let it go for any considerable time provided it be not beyond a Rectifying Day and note whether its gain or loss be at any time equal to what the Table allows if it is then the Clock is truly adjusted but if it have lost or got more or less than it should do then rectifie the Bob by making it shorter if it have gone too slow or screwing it down longer in case it has gone too fast then set it anew and observe it a second time continuing your altering of the Bob and new setting till you have brought it to rights For example Suppose you set it the Sixth of January you must upon this Day set it too slow by one Minute fifty two Seconds because the time is there set down in black Figures let it go till the 11th of February on which Day if it be well adjusted it must be 2′ 9″ too fast because that sum of time is there set down in red Figures but if it should happen to be too slow or too fast for that time as suppose 10 Minutes too fast instead of 2′ 9″ you must then adjust it nearer by screwing the Nut of the Bob down lower or making it longer by what means soever the same is to be effected then set it anew just so much too fast as the Table for that Day does allow and so let it go till the 4th or 5th of March on which Day observe it again and correct what you find to be amiss in the Motion Note hear that in adjusting by this Table you save your self the labour of casting up the sum of those Equations that belong to the time the Clock has gone in and by consequence the work of adjusting will be easier done by this than by the former Table When the Clock is well adjusted it may then be kept the whole Year about as near the true time as the design of the Table allows of by the following method about 12 a Clock on any Day which is not a Rectifying Day set it so much too fast or too slow for the Sun as the Equation in the Table for that Day comes to that is too slow if the Figures are black or too fast if the Figures are red then let it go on till a Rectifying Day comes which is known in the Table by this mark ☉ upon which Day about Noon set it backward from the place where the Hand then stood if the Figures on that Day are black or forward if they be red so much in time as the Figures express and observe to do the same upon every other Rectifying Day and then if the Clock be well adjusted it will go in all the intermediate parts according to the time given by the Table Take one Example to make this plain Suppose you have not an Opportunity to set it till the 18th of January the Equation for that Day is one Minute 24 Seconds too fast because the Figures are Red let it therefore be set
so much too fast for the Sun and let it go till the 8th of March on which Day about 12 a Clock set it forward from the Place the Hand is at 7′ 29″ because the Figures are red and then instead of being too slow as it before was it will be made to be 3′ 45″ too fast let it go till the 31st of that Month and then set it again forward 7′ 16″ after which on the 4th of June set it back 5′ 8″ because there you find Black Figures On the 22d of August set it also forward 7′ 23″ and on the 12th of September 7′ 17″ set it forward likewise on the 8th of October 5′ 20″ and also on the 15th of November 7′ 20″ likewise on the 3d of December let it be set back 7′ 28″ and on the 18th 7′ 3″ and on the first Day of the next Year 7′ 8″ And thus with a very little Pains and Trouble you may keep a Clock near the true Time of the Day by a more easy Way and Method than has at any Time been practised heretofore But in case you should miss rectifying your Clock on a rectifying Day then you must the next or any other Day following set him by the Sun so much too fast or too slow as the Nature of the Table requires and then he will again go on in that Order which the Design of the Table makes necessary that is he will then be capable of humoring the Suns Motion so far as that between being sometimes a little too slow and othertimes a little too fast 't will with a little Rectification be always within less than a fourth Part of a quarter of an Hour of the true Time In such Clocks as shew not Minutes the Time of setting must be guest at as well as you can Now the Reason of thus setting a Clock sometimes backward and sometimes forwards upon the rectifying Days is this If a Clock at the beginning of the Year be set to the Sun according to the former Directions it will be too slow by the 8th of March at Noon 3′ 44″ Now the Design of the Table being to keep the Clock so as that it shall at no Time disagree with the Sun above 3′ 45′ or the fourth part of a quarter of an Hour I then to prevent its being more too slow as it will if let go longer am necessitated to set it forward 7′ 24″ and then 't will be too fast for the Sun 3′ 45″ Now the Clock naturally losing at this Time of the Year it will again by the 31st Day be too slow 3′ 31″ Now the Clock being still naturally inclined to lose I therefore to prevent his being above 3′ 45″ too slow set him again 7′ 16″ forward from the Place where the Hand then stands and so he is again too fast for the Sun 3′ 45′ which is the most that I suffer him to differ from the apparent Time Now after this he going on for about 9 Weeks will the 4th of June be too fast 1′ 23″ at which Time I set him back 5′ 8″ that so he may be now 3′ 45″ too slow for by thus doing he will continue going the longer before he will require to be again new set which next happens to be August 22d which is above 11 Weeks Time Now the like Reason is the Cause of his requiring to be set anew in any other Place or Part of the Year And here I think fit to add one Caution to those that desire to adjust their Clocks very nicely and that is that among Dials they make use only of the horizontal or brass Dials which are fixt on Posts for no other can possibly give the Time so near the Truth neither on that should they make use of above one certain Hour and the nearer Noon that is the better for 't is a difficult thing even for the best Masters in this Art to draw a Dial so true as to contain an equal Time between all its Hours which though in other Cases it be not very material yet in this of adjusting a Clock it may cause a considerable Error Besides few Dials are fitted truly to the Latitudes in which they stand and if we could be certain that all were right as to these Particulars yet no Human Art can prevent the Sun's Refractions which as they make his Body appear much bigger when near the Horizon so they make him for a good part of the Day to shew to us higher than really he is and that must cause him to give a false Shadow on the truest Dial so that these particulars considered together 't is plain that there can be no true account taken of the Time till near Noon or 12 a Clock and he that watches for that Moment need not matter the falsness of the Dial wrong Latitudes nor Refractions neither because upon the Meridian let the Sun be higher or lower yet it still gives you the true 12 a Clock But in regard 't is so very hard to distinguish to a Minute by the Shadow of the best Dial small ones not admitting of minute Divisions and in large ones the Haziness or Faintness of the Shadow renders a minute difficult to be discerned exactly 't will therefore be better if instead of a Dial you make use of the following Device which I call a Meridian Cranny Take then Two plain and flat Plates or Boards about six or eight Inches square joyn them so close as that an old Groat or a Six Pence at the most may but pass between them let them be then fixed so as that the Chink or Cranny between them may respect as near as may be the Meridian or true South Point this will plainly give you the Time to half a Minute and less if you are careful to watch for the very first Beam that by the Sun 's coming to the South shall be darted through it which may be perceived in a Moment by the help of a smooth Board or Plate of Brass made black and placed near it on the North Side to receive the Light by this means the true Time of the Sun 's coming to the very same Point on the Meridian may be more exactly obtained than it can be by the best and truest Dial except such a one as is described by Mr. Molyneux in his Sciothericum Telescopicum But now although the true Time of the Sun 's coming to the South may by this means be more nearly obtained yet you will for all that find the Work of truly adjusting a Clock to be exceeding difficult especially to do it precisely when you have already brought to go prety nearly tru and this has made some to censure the Equation Tables as false because they could never adjust a Clock so as to acord therewith exactly or come Right the same Day twelve Month with that Dial to which it was set a Year before Now that I may do right to Truth I affirm that this proceeds not from any material