Citation de JLB21
WATER CLOCKS
IN ANCIENT INDIA THE STANDARD WATER CLOCK was the ghati. Similar timing devices were also used in many parts of Africa. To make a simple ghati, drill a small hole in the middle of a half coconut shell, and float it in a bowl of water. Gradually the water will leak in through the hole, and in due course the shell will sink. In an Indian temple, the monk would no doubt have had a finely engraved copper ghati, perhaps 20 cm (8in) in diameter, ratherthan a half coconut shell, and the hole would have been drilled to just the right size so that the ghati would sink in 24 minutes, which was the length of the Indian hour. The day comprised 60 hours of 24 minutes, so the minutes were the same length as they are today.
IN ANCIENT INDIA THE STANDARD WATER CLOCK was the ghati. Similar timing devices were also used in many parts of Africa. To make a simple ghati, drill a small hole in the middle of a half coconut shell, and float it in a bowl of water. Gradually the water will leak in through the hole, and in due course the shell will sink. In an Indian temple, the monk would no doubt have had a finely engraved copper ghati, perhaps 20 cm (8in) in diameter, ratherthan a half coconut shell, and the hole would have been drilled to just the right size so that the ghati would sink in 24 minutes, which was the length of the Indian hour. The day comprised 60 hours of 24 minutes, so the minutes were the same length as they are today.