Word: crusts
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Dates: during 1930-1939
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...Harian T. Stetson, director of the Perkins Observatory at Ohto Wesleyan University, for which the mirror is being cast at the Bureau of Standards, discussed land-tides similar in origin to the tides of the ocean. That the earth's crust actually shifts as a result of the gravitational pull of the moon on the earth is the theory advanced by Dr. Stetson...