Abstract
IN answer to my criticism (NATURE, September 4, p. 457), Mr. Blix refers (October 16, p. 593) to an article in the Skand. Arch. f. Physiologie, in which he has given “an account of the weighty reasons” leading him “to suppose that soaring birds are able to undertake successive alterations of direction with very little loss of vis viva.” To bring forward reasons, however, tending to show that birds can do certain things is no answer to an objection with regard to how they do them.
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BARTRUM, C. On the Soaring of Birds. Nature 42, 637 (1890). https://doi.org/10.1038/042637d0
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DOI: https://doi.org/10.1038/042637d0
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