Astrolabium.

4to: [32]-759 [= 749]-[4] pp. (title inner margin partly repaired, marg. wormtracks and wormhole in begin., dampstaining and (strong) soiling, tear without loss in p. 525).

Contemp. spr. sheep, gilt orn. spine with raised bands, red spr. edges (joints split, hed def.).

First edition of Clavius' important work on astrolabes. Illustrated with many diagrams in-text and some full-page; woodcut figuring an astrolabe on title. With tables of the position of the sun in 1600-1603 and of the sinus. According to Houzeau & Lancaster it is the first work which evokes prosthaphaeresis, i.e. an algorithm used in the late 16th-early 17th c. for approximate multiplication and division using formulas from trigonometry. The Jesuit mathematician Clavius (1538-1612), translator of Euclides, was part of the Vatican commission and in charge to set the basis of a new calendar: the Gregorian. As astronomer, Clavius opposed to Copernicus heliocentric model, even though he recognized to have problems with the Ptolemaic model.
Ref. EDIT16 12681. - DBS II:1217:9. - Adams C-2093. - STC French p. 186. - Houzeau & Lancaster 3291.
Prov. Pierre-François de Roubaix, "mayeur" of city and province of Mechelen (18th-c. ms. entry).