Page images
PDF
EPUB

THE

PREFACE
A

[ocr errors][merged small]

LT HO' there is little need of saying any thing by way of: Preface to the following Trea

tise ; yet Custom having made it almost as necessary as an Entrance to an House ; I shall so far comply with Cuftom as to say, That the following Directions for Surveying, &c. were put into my Hands in M. S. to be Enlarged, Correated and Improved, in such a Manner as to make them of General Use and Easy Pra&tice, according to the Modern, Best, and most Improved Methods in that Excellent and Useful Science.

How far and bore well that Design and Purpose bath been pursued in the following pages, I must leave to the Ingenuous Reader to judge, afier I have juft told bim that He will meet meet A 2

witb

with several very useful Definitions, Axioms, Problems and Theorems, wholly new, or at least newly apply'd. Here will be found also several new Problems adled, relating to the Art of Dividing Land; As also a New Method of Surveying large Tračts of Land, by Sounds as well as Sight, by Vertue of distant Explofions, first Invented and Published by those two great Genius's and Improvers of Natural Philosophy,the Learned Mr Whiston and Mr Ditton.

I shall only add, That to make this Treatise of as General Use as may be, the Reader will meet with an usefiel Colle Etion of all transparent Colours proper for the Beautifying Maps, Cbarts, &c. which perhaps may be thought. entertaining to the Curious. But if I bave made the whole Easy, Natural and Instructive, I bave gained my End, and the Satisfaction I aim at.

Edward Laurence.

The Explication of the Signs and

Characters used in the Treatise.

[ocr errors][merged small][merged small]

E RR A T A.

AG 2. line 18, put a Period after it p. 4.1. 7, dele

P. : ,

two. Po 7. l. 28, r. precede. p. &.1.21, for another, r. one Point. p. 9. 1. 18, r. O&tahedron. p. 9.1.23,r. Icosahedron. p. 12.1. 21, r. a Line. p. 14.1.9, for whose sides, r. each side whereof. p. 16. 1. 17, for are, r. is. p. 19.1. 13, r. Angles. p. 20. 1. 23, r. falling. p. 21. l. 1, v. per... 3d Def. p. 22. l. 11, r. 17th Def. p. 25. 1. 22, r. 13th Def. p. 28. 1. 23, r. I, th Def. p. 29. l. 15, for may, r. was. p. 31. l. 10, instead of for, r. from. p. 36.1. 3; for 68.61. ř. 168. 61. p. 37. l. 15, for 22-30, r. 22° 30° Po 38. l. 8, 7.. 407.6. p. 3.7.1. 2, r. Triangle for Angle. P. 39.1. 16, 7. Acure Angle b. p.40.4. 10, for b, r. bd. P. 41.1.11, for ab, r.cb. p. 42. 1.16, for 30,72,1.39° 22' p. 44. 1. 17, for d, r. da. p. 45. 1. 2, for 639r. 63.9. p.5'i. 1. 29, dele and. P. 52. l. 12, for 61°, 82', r. 61", 32. p. 52.425, for 61, 82', r. 61°, 32'. p. 54.1. 12, 7.714,25'. p. 57. 1. 17, r. Marks. p. 60. l. 26, r. be. twixt the Quarter. p. 63.1. 24, r. mentioned. p.71.1.18, r. Ic is. p. 72.l. 19, for B r. 8. p. 88. 1. 26, for 29, r. 24. p. 89.1..9. and in, for 6, r. 4: P. 969 l. 2, put the Word Leductions over the cwo Right-hand Columns po. 99. l. 15, r. 198 instead of 19. p. 103. 6. 17, and 18, for Rod, r. Rood. p. 104. l. 19, for Roors. r. Roods p. 108. 1. 26, tor Circumferencer. Circumferencor. p. 113. 1. ki, r. placing. p. 127.1 14,1. Fig. 99. p. 166. 1. 9, or Arc, r. Arc of a Circle. p. 167. 1. 18, r. Circumferentor. p. 169. 1. 15, for nr. 4. p. 185. 1. 12, Fa.eisher of the Products is.

« PreviousContinue »