:

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 Profeffor of ASTRONOMY in Oxford.

Now done into ENGLISH.

The Whole revis'd; where deficient, supplied; where
loft or corrupted, restor'd. Also

Many Faults committed by Dr. Harris, Mr. Cafwel,
Mr. Heynes, and other Trigonometrical Writers, are
shewn; and in those Cafes where They are mistaken,
here are given Solutions Geometrically true.
A more Ample Account of which may be seen in
Mr.Cunn's PREFACE.

By Mr. SAMUEL CUNN.

LONDON:

Printed for THO. WOODWARD at the Half-Moon, over-
against St. Dunstan's Churchin Fleet-Street. MDCCXXIII.

15-8-1934 and. Ed

Dr. KEI L's PREFACE.

A

YOUNG Mathematician may be surprized, to feé the old obsolete Elements of Euclid appear afresh in Print ; and that too after so many new Elements of Geometry, as have been lately publish'd; especially since those who gave is the Elements of Geometry, in a new Manner, would have us believe they have detected a great many Faults in Euclid. These acute Philosophers, pretend to have discover'd that Euclid's Definitions are not perfpicuous enough; that his Demonstra tions are scarcely evident; that his whole