Nürnberg: Simon Halbmaier, 1626. First Edition. Quarto, , 88, , 32 pages; VG-; bound in modern patterned paper covered boards; some mild wear and aging to pages; title page with two small holes to woodcut border, small red stain above one hole; two pinprick worming holes to gutter of first five leaves; both titles within architectural woodcut borders; part one with 100 woodcut diagrams in the text; lacking two folding woodcut plates in the second part; small red name stamp to ffep; text in German; SP consignment; shelved case 3.
Shelved Dupont Bookstore
Georg Galgemair was a German mathematician and astrologer and a pupil of Philipp Apian; his work on proportional circles allowed the advance of gnomonics. This volume involves the reduction compass as well as numerous questions and uses of the proportional circle, while the Apianic part deals with the manufacture and use of direction finding instruments for astronomical and terrestrial applications.;