. The life of the plant. Plant physiology. 256 THE LIFE OF THE PLANT scopic lumps of protoplasm, which are continually changing their shape (fig. 73). Though on a smaller scale they exhibit the same creeping movement as that described in the case of plasmodia, a fact which is easily understood, since plasmodia themselves, masses of protoplasm visible to the naked eye, are formed by the coalescence of a very great number of these micro- scopic lumps derived from the spores (fig. 73). Thus we see that protoplasm, the foundation of every. Fig. 73. cell, vegetable as well as animal, is endowed wit
. The life of the plant. Plant physiology. 256 THE LIFE OF THE PLANT scopic lumps of protoplasm, which are continually changing their shape (fig. 73). Though on a smaller scale they exhibit the same creeping movement as that described in the case of plasmodia, a fact which is easily understood, since plasmodia themselves, masses of protoplasm visible to the naked eye, are formed by the coalescence of a very great number of these micro- scopic lumps derived from the spores (fig. 73). Thus we see that protoplasm, the foundation of every. Fig. 73. cell, vegetable as well as animal, is endowed with a peculiar movement, inadequately accounted for as yet, and manifested indifferently whether surrounded by a wall or entirely free as in the case of the plasmodia of the slime fungi.^ These instances do not exhaust the phenomena of movement, exhibited by the vegetable cell. So far we have studied one kind of motion, the streaming move- ment of shapeless masses ; let us now study the pro- 1 There is a satisfactory attempt to explain this movement from the physical point of view. Unfortunately we cannot dwell on it, because it would take us too far into physics; we can only say that by mixing two liquids we can obtain, under the microscope, forms and movements exactly similar to 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 Timiri?a?zev, K. A. (Kliment Arkad?evich), 1843-1920; Sheremeteva, Anna, tr. London, New York, Bombay, Calcutta, Longmans, Green, and Co.
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