Iowa Heritage Digital Collections
State Library of Iowa

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Dr. John A. Eldridge and students watching the Foucault's pendulum in Physics Building, The University of Iowa, 1920s

Dr. John A. Eldridge and students watching the Foucault's pendulum in Physics Building, The University of Iowa, 1920s

Foucault's pendulum is named for the French physicist Jean Foucault, who first used it in 1851 to demonstrate the rotation of the earth. It was the first satisfactory demonstration of the earth's rotation using laboratory apparatus rather than…
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