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Calculating Machine for Predicting Tides
18" x 24"
Photographic Print

Original caption: 10/19/1929-Tide Predicting Machine. This machine determines the exact time of high and low tide for any given place, for any day, in any year. This "Brass Brain" is really a robot doing the work of 75 government mathematicians. Machine completed in 1910 by R. A. Harris and E. G. Fisher.