. Studies in general physiology. Physiology; Phototropism; Geotropism; Reproduction; Irritability; Regeneration (Biology). Heteeomoephosis 143 When the roots were brought in touch with the surface of the water, the latter acted upon the root as a solid body. The root began to grow rapidly in length, attaching itself to the surface of the water (as if it were the surface of a solid body). Whenever a root adhered to a solid body new stems arose from that surface of the root which lay diametrically opposite to the solid body. Usually these branches then grew. FIG. 24 FIG. 25 perpendicularly away
. Studies in general physiology. Physiology; Phototropism; Geotropism; Reproduction; Irritability; Regeneration (Biology). Heteeomoephosis 143 When the roots were brought in touch with the surface of the water, the latter acted upon the root as a solid body. The root began to grow rapidly in length, attaching itself to the surface of the water (as if it were the surface of a solid body). Whenever a root adhered to a solid body new stems arose from that surface of the root which lay diametrically opposite to the solid body. Usually these branches then grew. FIG. 24 FIG. 25 perpendicularly away from the surface of the solid body. When new stems arose from roots growing along the surface of the water, the stems grew vertically downward. X. ON THE FOEMATION OF TENTACLES IN OEEIANTHDS MEMBHANACEUS 1. I shall now discuss some experiments upon animals which seem to behave in accordance with AUman's theory of polarity, inasmuch as in these I did not succeed in producing a head in the place of an aboral pole. The experiments led however to the production of several heads lying one above the other in one and the same animal (see Figs. 24, 25). The irritability of the new heads could easily be com- pared with that of the old. In these experiments, more- Digitized by Microsoft®. 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 Loeb, Jacques, 1859-1924. Chicago, The University of Chicago Press
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