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The elements of physical and geometrical astronomy : to which is annex'd, Dr. Halley's synopsis of the astronomy of comets / With an introd. and indexes by I. Bernard Cohen.

The elements of physical and geometrical astronomy. To which is annex'd, Dr. Halley's synopsis of the astronomy of comets. With an introd. and indexes by I. Bernard Cohen.

Davidis Gregorii Astronomiµæ physicµæ& geometricµelementa.

Astronomiae physicae & geometricae elementa / auctore Davide Gregorio ...

Dr. Gregory's elements of catoptrics and dioptrics. Translated from the Latin original, with a large number supplement, by William Browne ... To which is added an appendix, by J.T. Desaguliers, containing an account of the reflecting telescopes ... with original letters which passed between Sir Isaac Newton and James Gregory, relating thereunto. Now first published.