Ancient Indian clock (ghati)

Ancient Indian clock (ghati)

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Credit: ADAM HART-DAVIS/SCIENCE PHOTO LIBRARY

Caption: Ancient Indian clock (ghati). The coconut shell takes a measured time to sink. In ancient times this was exactly 24 minutes. When it sank the priest would strike a gong and pull it up to the surface again. This indicated that one 'hour' had gone by and there were 60 hours in a day.

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Keywords: ancient, clock, coconut, device, early, ghati, historical, history, history of science, horology, instrument, materials, measure, measured, measurement, natural, old, shell, technological, technology, time

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