Picture No | 10052553 |
Date | 17th century |
Description | 17th century Sand Glass |
Details |
The SAND GLASS, also known as CLEPSAMMIA, measures time by how long sand takes to filter from the upper bulb into the lower ; different apertures measure different periods
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Source | cigarette card by an unnamed artist in Morris's series 'Measurement of Time' (1924) |
Credit | Mary Evans Picture Library |
Restrictions |
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