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Euclid's ELEMENTS

OF

GEOMETRY,

From the Latin

Translation of COMMANDINE.

To which is added,
A TREATISE of the Nature and Arithmetick

of LOGARITHMS; Likewise
Another of the ELEMENTS of Plain and

Spherical TRIGONOMETRY; With
A PREFACE, shewing the Usefulness and Excellency

of this WORK:

By Doctor JOHN KEIL, F. R. S.

and late Profeñor of ASTRONOMY in Oxford.

Now done into ENGLISH.

The Whole revis'd; where deficient, supplied; where

lost or corrupted, restor’d. Also
Many Faults committed by Dr. Harris, Mr. Cafwel,
Mr. Heynes, and other Trigonometrical Writers, aré
shewn; and in those Cases where They are mistaken,

here are given Solutions Geometrically true.
A more Ample Account of which may be seen in

Mr.Cunn's PREFACE.

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By Mr. SAMUEL CUNN.

LONDON:
Printed for Tho. WOODWARD at the Half-Mcon, over-
against St. Dunstan's Church in Fleet-Street. MDCCXXIII.

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5-8-1934

aad. Ed.

Dr. K E I L's PREFACE.

YOUNG Mathematician

may be surprized , to see A the old obsolete Elements

of Euclid appear afrefi in Print ; and thåt too

after so many new Elements of Geometry, as have been lately publisk'd; especially since those who gavė üs the Elements of Geometry, in a neto Manner, would have us believe they have detected a great many Faults in Euclid. These acute Philosophers, pretend to have discoverd that Euclid's Definitions are not

perspicuous enough; that his Demonstra. tions are scarcely evident ; that his whole

A

Elements

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