Page:Insectivorous Plants, Darwin, 1899.djvu/83



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.