An ancient #Nilometer faces Aswan. Consisting of a stairway on the river’s bank constructed of regular-shaped stones this useful tool was designed that the water, rising & falling with the ebb and flow of the flood, could register maximum, minimum & average water level. The #Nilometre was repaired by Khedive Ismail in 1870. A new scale was established and the ancient construction, unused for centuries, came into use once again.
A second Nilometre, dating back to the 26th Dynasty, was found during excavation on Elephantine island. The instrument is unique in having its calibration based upon the level that the flood waters reach above the agricultural land, and not how high they are above the low-water mark.
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Google.org Energy Generalist - Mountain View - Google Jobs
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