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Nature 130, 25 (2 July 1932) | doi:10.1038/130025a0;

The Velocity of Light

OLIN C. WILSON

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In this connexion the following remarks on the measurement of the standard metre in terms of the wave-length of the red cadmium line may be of interest. If L and ƒ represent, respectively, the length of the metre and the number of wave-lengths, λ, contained in it, we may write L=ƒ1λ1=ƒ2λ2 .