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Clocks, Domestic, General 'Tortoise' clock, probably 19th century

Clocks, Domestic, General 'Tortoise' clock, probably 19th century
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Largest available format 3504 × 2843 px 1 MB
Dimension [pixels] Dimension in 300dpi [mm] File size [MB] Online Purchase
Large 3504 × 2843 px 297 × 241 mm 1.2 MB
Medium 1024 × 831 px 87 × 70 mm 893 KB

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Image number
UIS5062825
Image title
Clocks, Domestic, General 'Tortoise' clock, probably 19th century
Auto-translated text View Original Source
Location
Science Museum, London, UK
Medium
object
Image description

Clocks, Domestic, General 'Tortoise' clock, probably 19th century. In this clock the time is indicated by a floating 'tortoise' attached to a magnet. This magnet is acted on by another magnet beneath the plate dial which is rotated by the clock movement. In 1632, F Linus invented a mystery clock in which the hour was indicated by the rotation of a floating globe. Galileo (1564-1642) asserted that he had invented a similar clock many years before, the rotation being effected by a magnet carried by a concealed clock movement. ©SSPL/Science Museum

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