Sachgebiete

Beschreibung:

Mit einer gestochenen Titel- und einer gestochenen Kopfvignette sowie 27 gefalteten Kupfertafeln XL, 590 Seiten, 1 weißes Blatt. 27 x 21 cm, braunes HLdr der Zeit mit reicher Rückenvergoldung.

Bemerkung:

Ferdinand Berthoud (1727-1807). The first edition of this famous work describing Berthoud?s marine timekeepers. The Streeter copy. Berthoud and Pierre Le Roy vied to perfect the marine chronometer in the late 1760s, with Berthoud eventually judged to have the better design. No. 6 was one of the first timekeepers to be housed in the type of box that became the standard for all marine chronometers. The development of such clocks was an essential step in establishing the length of a degree of longitude. Le Roy, upset that Berthoud makes no mention of him, answered with his own treatise on the subject, Précis des recherches. See Catherine Cardinal, ?Ferdinand Berthoud and Pierre Le Roy: Judgment in the Twentieth Century of a Quarrel Dating from the Eighteenth Century" in: The Quest for Longitude, ed. William J.H. Andrews, Cambridge, Mass., 1996, pp.282-292. Quarto (254 x 185mm). Half-title, title with engraved vignette. 27 engraved folding plates at rear by P. P. Choffard after Goussier. Das obere Kapital leicht lädiert, stellenweise mit leichtem Feuchtigkeitsrand an der Oberkante des Buchblocks