London: Printed for J. Whiston and B. White, 1757.
1st Edition. Hardcover. Very Good. Item #002871
4to (223 x 177 mm). , 52,  pp., including folding engraved plate. Bound in 20th century cloth, spine titled in black (little soiling of boards, new endpapers). Title-page browned and somewhat soiled, little chipping to fore-edge, plate with slight loss along a fold, text little browned in outer margins, but otherwise clean and unmarked. ----
RARE FIRST EDITION. The author's principal work, containing a catalogue of the elements of the comets then known, and an explanation of Newton's problem of finding a comet's orbit from three observations. The most valuable (and most original) part is the "Table of the Parabola," for ascertaining any orbits which are approximately parabolic." (Wikisource). The work is quite scarce: only two copies have sold at auction since 1975, according to American Book Prices Current. - Visit our website for additional images and information.
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