Description of a new-invented Thirty hour Sand Chronometer, shewing distinctly the Hour and Minute, without stopping even while it is turned.

Catalogue no: 1462
Dewey No: Subject(s): Courtenay Ilbert Archive
Author(s): Unknown
Total pages: 4 Illustrations: 8 Language(s): English Publication date: Nov. 1758
Editor: Publisher: The Gentleman's Magazine
Dimensions: 215mm x 135mm Condition: Good
Related titles: Related library records:
Notes:

Pages extracted from the November, 1758 issue of The Gentleman's Magazine and bound between marbled paper covers.

The article describes in detail an unusual sandglass, made of iron and wood,incorporating dials and gearing. Illustrated on a fold-out page (250mm x 210mm) with 8 engravings showing the mechanism.

Described as a chronometer and "...every way moveable to conform to the agitations of a ship", suggesting that this was one of the eccentric inventions intended to solve the longitude puzzle.

Room location: Library Extension Cabinet: F Shelf: 5
Search terms: Sandglasses
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