| http://www.w3.org/ns/prov#value | - These were recognized by the scientific community as the most significant of several kinds of attempts to measure the velocity of the earth through the ether, a substance that scientists believed filled the universe (the experiment determined that ether did not exist), From 1889 to 1892 Michelson was a professor of physics at Clark University and from 1892 to 1929 was head of the physics departmen
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