. Physiological botany; I. Outlines of the histology of phænogamous plants. II. Vegetable physiology. Plant physiology; Plant anatomy. 386 VEGETABLE GROWTH. instances of plants growing in liot springs, it may be said to lie at or verj' near 60° C. The figures obtained by Sachs for the common plants he experimented upon are in general between 36° and 46° C. It is a curious fact that some tropical plants are not capable of bearing a higher temperature than a few plants of cold countries.^. 1013. The optunum temperature for growth lies in most cases between 20° and 36° C. 1014. The following tabl
. Physiological botany; I. Outlines of the histology of phænogamous plants. II. Vegetable physiology. Plant physiology; Plant anatomy. 386 VEGETABLE GROWTH. instances of plants growing in liot springs, it may be said to lie at or verj' near 60° C. The figures obtained by Sachs for the common plants he experimented upon are in general between 36° and 46° C. It is a curious fact that some tropical plants are not capable of bearing a higher temperature than a few plants of cold countries.^. 1013. The optunum temperature for growth lies in most cases between 20° and 36° C. 1014. The following table, compiled bj^ Pfeffer, exhibits at a glance the cardinal points of temperature as they have been determined by four observers : — 1 Pfeffer: Pflanzeiiphysiologie, ii., 1881, p. 123. Fig. 171. Apparatus for keeping peedlinga in a constant temperature Tlie drum at d is an ordinary tlierrao-regulator by whicli tlie flow of illuminating gas can be controlled within narrow limits To insure still greater control, the more sensitive regulator, r. is also employed. The cylindrical vessel, z, has double walls, the space between them being filled with water. Under this vessel a very small burner is sufiicient even for optimum temperature. (Pfeffer.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Goodale, George L. (George Lincoln), 1839-1923. New York [etc. ] : American Book Co.
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