大英博物館のインスタグラム(britishmuseum) - 7月16日 04時49分

When clocks and watches were invented around 1200, sound, touch and illumination were all used to read the time in darkness. This was significant because electric lighting did not become widespread until the 20th century.

This photograph shows a detail from a night clock by Pietro Tomasso Campani made in 1683. When it is dark, light from an oil lamp behind the dial shines through the cut-out Roman numerals enabling the time to be read. Each hour, the numeral for that hour moves round the dial. This ‘wandering hour’ dial was invented by the makers of this clock.

You can see this clock in a new display of clocks and watches in our Members’ Room, just one of the many benefits of becoming a Member of the British Museum. Find out more about Membership at www.britishmuseum.org/membership
#clock #watch #nightclock #horology

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