First print run (with no date printed on title) of the first separate edition (the 1st print was published as the concluding section of the author's »Protomathesis« in 1532) of this early, important and profusely illustrated account on sundials, clepsydrae and other ancient time-keeping instrument including diptychs, rings, multi-faceted and pillar dials, quadrants, mariner's astrolobes, as well as the mathematical or astronomical principles governing their use and design. The woodcuts by „G. Bordei“ (as mentioned in the preface) are elaborate adaptions of or newly cut versions taken from the blocks of those depicted in the »Protomathesis«. Oronce Finé (1494-1555), a famous French scholar and chair of mathematics at the Collège Royal since 1531, had also constructed an ivory sundial in the form of a ship, nowadays housed by the Milan Museo Poldi Pezzoli. Several woodcuts of the book refer to this construction. - Present copy was separated of a Sammelband and is protected with mould paper wrappers. Top edge of block with tighter cut, no text loss however, p. 202 with tight cut front edge, some pages foxy and stained, spine in parts loose, otherwise well preserved copy indeed. - Particularly hard to find with the big (37,5:29 cm) folded diagram usually bound in at the end of the volume. - Adams F 473 (copy without folded diagram); Fairfax-Murray 165; Harvard 232; Houzeau-L. 11351; Mortimer I, 232; Poggendorf I, 747ff. Description thanks to Heritage Book Shop, USA.
