Euclid's Elements of geometry, [electronic resource] : from the Latin translation of Commandine. To which is added, a treatise of the nature and arithmetic of logarithms; Likewise Another of the elements of Plane and Spherical Trigonometry; With a preface, shewing the Usefulness and Excellency of this Work, By Doctor John Keill, F. R. S. and late Professor of Astronomy in Oxford. The whole revised; where deficient, Supplied; where lost, or corrupted, Restored. Also, Many Faults committed by Dr. Harris, Mr. Caswell, Mr. Heynes, and other Trigonometrical Writers, are shewn; and in those Cases where They are mistaken, here are given Solutions Geometrically True. An Ample Account of which may be seen in the Preface. By Samuel Cunn.