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Richard Hornby & Son: Two-Day Marine Chronometer

Map: GLOBE297
 
Cartographer: Richard Hornby & Son
Title: Two-Day Marine Chronometer
Date: c. 1850
Published: London
Width: 7 inches / 18 cm
Height: 8 inches / 21 cm
Map ref: GLOBE297
Description:
Rare mid-19th Century mahogany cased two-day marine chronometer, with glass viewing lid and original winding instrument. Sold by John Bruce & Sons, Liverpool, UK. [GLOBE297] The invention of accurate marine chronometers like this one finally gave sailors the ability to calculate longitude at sea, significantly improving the precision of navigation and the accuracy of sea charts in general. These hardy instruments were manufactured to keep constant time despite the rough and wet conditions at sea.