The Ethereal Aether: A History of the Michelson-Morley-Miller Aether-Drift Experiments, 1880-1930The Ethereal Aether is a historical narrative of one of the great experiments in modern physical science. The fame of the 1887 Michelson Morley aether drift test on the relative motion of the earth and the luminiferous aether derives largely from the role it is popularly supposed to have played in the origins, and later in the justification, of Albert Einstein's first theory of relativity; its importance is its own. As a case history of the