GEOGRAPHISCHE UNIVERSAL-ZEIG UND SCHLAG-UHR.

image6770

Johann Baptist Homann


Geographische Universal-Zeig und Schlag-Uhr.

Copper plate engraving, c.1730.
19 1/4 x 22 3/4 (49 x 57.8 cm) plus margins.
Good condition save for some repaired splitting along lower centerfold. Full original color.
LOCATION: New York City

Inventory Number: 6770
Price: $975.00
Publisher : Published in Nuremberg.
This remarkable clock and map demonstrates the use of time to determine longitude, and was based on the work of German clockmaker Zacharias Landteck. The close notes a 24 hour day the is broken up into two 12 hour segments. The map itself shows the Northern Hemisphere from the North Pole. Shading delineates daylight hours and nighttime. The clock itself is beautifully shown within a wooden case with a elaborate surround. Landteck’s work eventually led the English clockmaker John Harrison to design the marine chronometer in order to measure time accurately enough to ascertain longitude in the 1760s. California is shown as an island. First state of two. Maps , Curiosities

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