The Geometrician

D. M. Sines. Cofines Tang. Co-Ta. Secants Co-Se. M. D.

42: 0.6691.74319004 1.111 1.346 1.494 o. 10.6713.7412.9057 1.104 1.349 1.490 50 20.673473929020 1.0981.3531.485 40 30.6756-7373 9163 1.091 1.356 1.480 30 40.6773 7353 9217 1.085 1.360 1.475 20 50.6799 7333-9271 1.079 1.364 1.471 10 0.6820 731393251.072 1.367 1.466 o 10.6841.7294.9380 1.066 1.371 1.462 50 20.6862.7273-9434 1.060 1.375 1.457 40 30.688372549490 1.054 1.379 1.453 30 40.6905.72349545 1.048 1.382 1.448 20 50.6926.7213.9601 1.041 1.386 1.444 10 44 0.6946.7193 .9657 1.0351.390 1.439 0 10.6907.7173.97131.029 1.394 1.435 50 20.6988.7153 9770 1.023 1.398 1.431 40 30.70097132.9827 1.018 1.402 1.427 30 40.7030.7112.9884 1,012 1.406 1.422 20 59.7050.7092.9942 1.000 1.410 1.418 10

44 60.7071.7071 1.000 1.000 1.414|1.414

Cofine. Sine. Co-Ta. Tang. Co-Se. Secant.

148

O 45

THE END OF THE ELEMENTS OF TRIGONOMETRY,

ADVERTISEMENTS.

The following Maps, &c. published by the Anthor, are fold by Mr. SAYER, Printfeller, in Fleet-Street.

1. A MAP of the Country Eleven Miles round BRISTOL ; made from an actual Survey, by B. DONN, Price Ten Shillings and Sixpence, in Sheets; or Sixteen Shillings and Sixpence, fitted up on Canvafs, with Rollers, and coloured.

2. A PLAN of the City of BRISTOL, by B. DONN. Price One Shilling and Sixpence.

The AUTHOR'S MAP of the County of DEVON (which obtained the Premium of One Hundred Pounds of the SOCIETY OF ARTS, ) is fold at EXETER,

The following BOOKS, written by B. DONN, are fold by B. LAW, in AVE-MARIA-LANE, and J. JOHNSON, in ST. PAUL'S-CHURCH-YARD, LONDON.

1. ESSAYS on ARITHMETIC, Vulgar and Decimal; containing not only the practical Rules, but alfo the Reasons and Demonstrations of them. Price Six Shillings, bound.

2. THE ACCOUNTANT; containing Effays on Book-keeping by Double Entry; illuftrated in Five Sets of Books; viz. I. A wholefale Trade. II. Foreign or Merchants Accounts. III. Retail Shop-keeper. IV. Stewards Accounts. V. WeftIndia Factorage, Price Four Shillings, bound.

3. THE GEOMETRICIAN; Containing Effays on Logarithms, Geometry, and Trigonometry. Price Six Shillings, bound. 4 THE BRITISH MARINER'S ASSISTANT; containing 40 Tables, adapted to the feveral Purposes of Trigonometry and Navigation. To which are prefixed, An ESSAY on LOGARITHMS, and NAVIGATION EPITOMIZED. Price 6s.

5. An EPITOME of Natural and Experimental Philofophy, including Geography, with the Ufe of the GLOBES (being an Abridgement of his Lectures on thefe Subjects). Price Two Shillings and Sixpence, ftitched.

6. An ESSAY on CIRCULATING or INFINITE DECIMALS. Price is. in Sheets. Printed of a proper Size to be bound up with the Eays on Arithmetic or Book-Keeping.

Mr. DONN has alfo published the following INSTRUMENTS, which are fold by Mr. JOHNSON; alfo by Mr. SAYER, PrintSeller, in Fleet-ftreet, and Mr. WING, Mathematical-Inftrument-Maker, in the Strand.

1. The Variation and Tide Inftrument improved. Two Shillings.

Price

2. The Lunar and Tide Inftrument. Price Two Shillings. 3. The Panorganon, for folving the ufual Problems of the Terreftrial Globe. Price Six Shillings, coloured.

4. The improved Analemma, for folving the Problems of the Celestial Globe. Price Three Shillings and Sixpence.

The Ufe of thefe four Inftruments is published, and may be had with the Inftruments. Price Sixpence.

5. The Nautical Pocket-Piece. Price Sixpence.

6. The Navigation-Scale improved, (Price Five Shillings,), with the Pamphlet of its Ufe.

This laft Inftrument is fold by Meffrs. ADAMS, HEATH and WING, LINCOLN, MARTIN, NAIRNE, WATKINS, and WHITFORD, Mathematical-Inftrument-Makers.

D EX
DE

то THE

WHOLE VOLUME.

Note, The numeral Letters denote the Essays ;
thus, thofe Articles, which have I. prefixed, are
in Elay I. or Effay on Logarithms: II. Are in
that on Geometry: III. In the laft, or Efay on
Trigonometry.