Berber Water Timer

An ancient way to share village irrigation water, the elders timing dish has a tiny hole in it and in this case takes 7minutes to sink. Each time it sinks he would tie a knot in the palm so say 4 knots is approximately 30minutes. If you have a large field you are allowed more of the precious resource water! Simple an fair from hundred of years ago
The museum in Morocco is a great visit

https://www.facebook.com/profile.php?id=100028871456739