IN 1899 I chanced to read in the Journal de Physique for that year two articles which provided no small part of my interest in life for several years, and the reading of which perhaps determined my career. They contained Pellin and Broca's description of the constant deviation prism, and Michelson's of his echelon diffraction grating. Michelson's first complete description is in the Astrophysical Journal for June 1898.

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T., F. [Obituary]. Nature 127, 825–826 (1931). https://doi.org/10.1038/127825b0

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