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Updated: May 29, 2025
I cannot say that I am convinced by your criticisms. With respect to the decapitated frog, I have always heard of Pflüger as a most trustworthy observer. If, indeed, anyone knows a frog's habits so well as to say that it never rubs off a bit of leaf or other object, which may stick to its thigh, in the same manner as it did the acid, your objection would be valid.
The majority returned no answer; eleven Russian and twenty-eight Germans replied, but four of them merely said that "they had no personal experience," etc.; there thus remained thirty-five. Of these E. Pflüger, of Bonn, was skeptical of the advantage of any propaganda of abstinence: "if all the authorities in the world declared the harmlessness of abstinence that would have no influence on youth.
May we not suppose that masses of it were produced during the incandescence of the earth, and that, when the waters descended, they passed through a series of changes which culminated in living plasm? Such is the "cyanogen hypothesis" of the origin of life, advocated by able physiologists such as Pfluger, Verworn, and others.
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