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Prodromus Cometicus, quo Historia, CometÃ¦ - HEVELIUS, Johannes - 1665. 
Engraved vignette on title & three engraved plates (one folding). 2 p.l., 64 pp. Folio, cont. Dutch vellum over boards (spine a little defective), covers panelled in blind, in center of each cover a large arabesque device. Danzig: Autoris typis, et Sumptibus, 1665. [bound with]:-. Descriptio Cometae Anno Aerae Christ. M.DC.LXV. exorti, cum genuinis Observationibus, tam nudis, quam enodatis, Mense Aprili habitis Gedani. Cui addita est Mantissa Prodromi Cometici, Observationes omnes prioris Cometae MDCLXIV, ex iisq; genuinum motum accurate deductum, cum notis, & animadversionibus exhibens. Engraved vignette on title, one engraved illus. in the text, 4 engraved plates (one folding), & tables in the text. 6 p.l., 188 pp. Folio. Danzig: Autoris typis, et sumptibus, 1666. A most attractive sammelband of two first editions by Hevelius from the library formed by Sir Christopher Sykes (1749-1801), at Sledmere House in Yorkshire. I. "Dedicated to Colbert, controller general of finance to Louis XIV, who had been instrumental in procuring an annuity for Hevelius. The work was published as a forerunner to the projected opus [published in 1668 as the Cometographia] on the theory of comets. The present work contains a description of the Comet of 1664 and a synopsis of the author's theory of cometography."-Johannes Hevelius (B.Y.U., 1971), p. 84. II. The first part of this book presents Hevelius's observations of the comet of 1665 and includes a synopsis of his general cometary ideas. "Features all observations of the Comet of 1665, together with the calculations as well as general comments on the theory of comets. Mantissa Prodromi Cometici, which begins on page 57, is a reply to the criticism voiced by Petit, Auzout, and others, who disagreed with Hevelius's findings in his Prodromus Cometicus."-Johannes Hevelius (B.Y.U., 1971), p. 84. Provenance: Inscription of "Cat. V1 P331 CS Sledmere" on front paste-down endpaper. Fine unpressed copies. Preserved in a morocco-backed box. ? Johannes Hevelius (B.Y.U., 1971), 8 & 9.
[Bookseller: Jonathan A. Hill, Bookseller, Inc.]
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