Abstract
I HAD not intended to make the statement which Mr. Bartrum considers is implied in my words, and am sorry that in aiming at brevity I appear to have achieved only ambiguity. It need scarcely be said that I agree that no experiment has been, or can be, devised which can measure the velocity of light in any unidirectional course. The impossibility of any such experiment is, in effect, the primary postulate of the theory of relativity.
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JEANS, J. [Letters to Editor]. Nature 107, 42–43 (1921). https://doi.org/10.1038/107042b0
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DOI: https://doi.org/10.1038/107042b0
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