MY remarks on anchor-ice, published in NATURE, vol. xxi. p. 538, have called forth several letters to myself, in addition to the articles on this subject by Mr. Allan Macdougall and C. F. C. respectively, which have a place in vol. xxi. p. 612 and vol. xxii. p. 31 of your journal. I am happy to find that C. F. C. agrees generally with my views, but I regret to have to differ from him when he says that “the original (ice) crystals, if not heavier than water, are at least as heavy.” Were this supposition true, anchor-ice might as readily form in one part of a stream as in another, and would not require the conditions which I believe to be necessary. These minute crystals have never been seen by me “distributed” pretty eyenly throughout the body of water at rest, nor even where there was a smooth, slow, steady current, which would be the case if the specific gravity of the crystal and water were alike.
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RAE, J. Anchor-Ice. Nature 22, 54 (1880). https://doi.org/10.1038/022054b0
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