Gnomonices Libri Octo, in quibus non solum Horologiorum solarium, sed aliarum quoquam rerum, quae ex Gnomonis umbra cognosci possunt, descriptiones Geometricè demonstrantur
by CLAVIUS, Christoph
Finely engraved title-page, numerous handsome woodcuts & diagrams in the text, & woodcut printer's device on final leaf. 8 p.l. (incl. engraved title), 654 pp., one leaf of colophon. Small folio, cont. finely blindstamped panelled pigskin over boards (old ownership inscription scratched out at an early date from blank margin at foot of second leaf). Rome: F. Zanetti, 1581. First edition and an absolutely lovely copy of the best and most influential book on the theory and construction of sundials; Lalande describes it as "le plus considérable de tous les livres de gnomonique" (p. 112). This handsomely illustrated book describes and illustrates both fixed and portable dials. Amongst the numerous fine woodcut diagrams, there are illustrations of the construction details and finished instruments. Clavius (1537-1612), mathematician, astronomer, and reformer of the calendar, taught dialling and other scientific subjects at the Collegio Romano in Rome for nearly 47 years. Fine copy. ❧ D.S.B., III, pp. 311-12. Zinner, Astronomische Instrumente des 11. bis 18. Jahrhunderts, pp. 280-81.
(Inventory #: 6111)
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