Abstract
I NOTE in NATURE of February 9 (p. 486) an account of a recent unsuccessful attempt to verify the existence of water-vapour on Mars, already demonstrated by means of other methods by Dr. Slipher and myself(see The Astrophysical Journal, vol. xxviii., p. 397, December, 1908, and Lowell Observatory Bulletins, Nos. 36, 43, and 49). Will you allow me to point out that the method employed by Director Campbell was proposed several years ago by Dr. Percival Lowell, and was actually tested by Dr. Slipher at the Lowell Observatory in 1905, with a result similar to that which Director Campbell has now obtained in his repetition of the experiment? The details may be found in Lowell Observatory Bulletin No. 17.
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VERY, F. Water-Vapour on Mars.. Nature 86, 110 (1911). https://doi.org/10.1038/086110b0
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DOI: https://doi.org/10.1038/086110b0
