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Scientific American

February 18, 1888

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On a Method of making the Wave Length of Sodium Light the Actual and Practical Standard of Length

By Albert A. Michelson & Edward W. Morley

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SA Supplements Vol 25 Issue 633suppThis article was originally published with the title “On a Method of making the Wave Length of Sodium Light the Actual and Practical Standard of Length” in SA Supplements Vol. 25 No. 633supp (), p. 10115
doi:10.1038/scientificamerican02181888-10115asupp
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