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It may be worth adding that immersion in cold water does not cause any inflection : I suddenly placed four leaves, taken from plants which had been kept for several days at a high temperature, generally about 75° Fahr. (28°.8 Cent.), in water at 45° (7°.2 Cent.), but they were hardly at all affected; not so much as some other leaves from the same plants, which were at the same time immersed in water at 75°; for these became in a slight degree inflected.
expected, far more sensitive to an increase of temperature than is Drosera. Thus, as I bear from Dr. Burdon Sanderson, a frog begins to be distressed in water at a temperature of only 85° Fahr. At 95° the muscles become rigid, and the animal dies in a stiffened condition.
