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earth_n north_n pole_n south_n 3,753 5 10.5697 5 false
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ID Title Author Corrected Date of Publication (TCP Date of Publication) STC Words Pages
A51544 Mechanick dyalling teaching any man, though of an ordinary capacity and unlearned in the mathematicks, to draw a true sun-dyal on any given plane, however scituated : only with the help of a straight ruler and a pair of compasses, and without any arithmetical calculation / by Joseph Moxon ... Moxon, Joseph, 1627-1691. 1668 (1668) Wing M3009; ESTC R20066 27,959 54

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to the end of the second Degree and transfer that distance upon your Rule from B to the second mark or devision between the two first drawn Lines And thus measure the distance of every Degree from the first Degree described on the Quadrant and transfer it to the Rule But for distinction sake you may draw every tenth devision from the first Line parallel to the edge of the third Line and mark them in succession from the beginning with 10 20 30 to 90 and the fifth Devisions you may draw half way between the second and the third parallel Lines the single Devisions only between the two first parallel Lines So is your Line of Chords made The Vse of the Line of Chords AS its use is very easie so its convenience is very great for placing one Foot of your Compasses at the first Devision on the Scale and opening the other to the 60 th Degree you may with the points of your Compasses so extended describe a Circle and the several Devisions on the Scale shall be the Degrees of the four Quadrants of that Circle as you may try by working backwards to what you were just now taught in the Making the Scale For as before you measured the distance of the Degrees of the Quadrant and transferr'd them to the Scale so now you only measure the D●visions on the Scale and transfer them to the Quadrant Semi-Circle or whole Circle described on your Paper For Example If you would measure 30 Degrees in your described Circle place one Foot of your Compasses at the begining of Devisions on the Scale as at A and extend the other Foot to the Divisions marked 30 and that distance transferred to the Circle shall be the distance of 30 degrees in that Circle Do the like for any other number of Degrees You may draw your Dyal first on a large sheet of Paper if your Dyal Plane be so large if it be not so large draw it on a smaller piece of Paper Then rub the back-side of your Paper-Dyal with Smal-coal till it be well black't and laying your Paper Dyal on your Dyal Plane so that the East West North or South Lines of your Paper agree exactly with the East West North or South scituation of your Dyal Plane Then with Wax or Pitch fasten the Corners of the Paper on the Plane and laying a straight Ruler on the Hour-Lines of your Dyal draw with the blunted point of a Needle by the side of the Ruler and the Smal-coal rub'd on the back-side the Paper will leave a mark of the Lines on the Plane If you will have the Lines drawn Red you may rub the back-side of your Paper with Vermillion if Blew with Verditer if Yellow with Orpment c. Then draw upon these marked Lines with Oyl Colours as you please An Explanation of some Words of Art used in this BOOK ANgle The meeting or joyning of two Lines Arch. A part of a Circle Axis The straight Line that runs through the Center of a Sphere and both ways through the Circumference though in Dyalling it is all one with the Diameter of a Circle Clinatory See Fol. 8 9 10. Chord See Fol. 44 45 46. Complement The number that is wanting to make up another number 90 Degr. or 180 Degr. or 360 Degrees Contingent A Line crossing the Substile at right Angles Degree See Fol. 12. Diameter The longest straight Line that can be contained within a Circle viz. the Line that passes through the Center to the Circumference both ways Dyal Plane See Fol. 7. Elevation of the Pole So many degrees as the Pole is elevated above the Horizon Equinoctial The Equinoctial is a great Circle that runs evenly between the two Poles of the World But when we name the Equinoctial in this Book we mean a small Circle which represents it and is the Circle or Arch of a Circle which is divided into equal parts to find thereby the unequal parts on the Line of Contingence In the Horizontal Dyal it is that Arch of a Circle marked GCH Horizon Is a great Circle encompassing the place we stand upon but in Dyalling it is represented by a straight Line as in Operat III. In the South Dyal the Line VI A VI is the Horizontal Line Latitude The Latitude of a Place is the number of Degrees contained between the Equinoctial and the place inquired after Line of Contingence See Contingent Magnetick Needle The Needle touch'd with the Loadstone to make it point to the North. Meridian is a great Circle of Heaven passing through the North and South points of the Horizon but in Dyalling it is represented by a straight Line as in Operat II. in the Horizontal Dyal the Line XII A is a Meridian Line Nadir The point directly under our Feet Nautial Compass Is the Compass used by Navigators whereon is marked out all the 32 Winds or Points of the Compass Oblique Plane See Fol. 7. Parallel See Fol. 6 Perpendicular See Fol. 5. Pole The North or South Points on the Globe of the Earth are called North or South Pole Quadrant The fourth part of a Circle Radius Half the Diameter of a Circle Right Angle A straight Line that falls perpendicularly upon another straight Line makes at the meeting of those two Lines a Right Angle Semi-Circle Half a Circle Semi-Diameter The same Radius is Sphere The highest Heaven with all its imagined Circles is called the Sphere Stile The Gnomon or Cock of a Dyal Substile The Line the Stile stands on upon a Dyal Plane Triangle A figure consisting of 3 Sides and 3 Angles Zenith The Point directly over our Head FINIS A Catalogue of GLOBES Coelestial and Terrestrial Spheres Mapps Sea-Platts Mathematical Instruments and Books made and sold by Joseph Moxon on Ludgate-Hill at the Sign of Atlas GLOBES 26 Inches Diameter The price 20 l. the pair GLOBES near 15 Inches Diameter The price 4 l. GLOBES 8 Inches Diameter The price 2 l. GLOBES 6 Inches Diameter The price 1 l. 10 s. CONCAVE HEMISPHERES of the Starry Orb which serves for a Case to a Terrestrial Globe of 3 Inches Diameter made portable for the Pocket Price 15 s. SPHERES according to the Copernican Hypothesis both General and Particular 20 Inches Diameter Price of the General 5 l. Of the Particular 6 l. Of both together 10. SPHERES according to the Ptolomaick Systeme 14 Inches Diameter Price 3 l. SPHERES according to the Ptolomaick Systeme 8 Inches Diameter Price 1 l. 10 s. Gunter's Quadrant 13 Inches Radius printed on Paper and pasted on a Board with a Nocturnal on the backside Price 5 s. Gunter's Quadrant 4 Inches Radius printed on Paper and pasted on Brass with a Nocturnal on the backside and a Wooden Case covered with Leather fit for it A new invention contrived for the Pocket Price 6 s. A large Mapp of the World 10 Foot long and 7 Foot deep pasted on Cloath and coloured Price 2 l. A Mapp of all the World 4 Foot long and