. General physiology; an outline of the science of life. . Fig. 34.—ft, Vaucheria tube cut open at the upper end ; the protoplasm is flowing out and taking the form of globules. (After PfefEer.) b, Aniasia-cOl containing a pale racuole and various small fat-droplets. liquid nature of the cell-contents, and no investigator who is familiar with the phenomena need hesitate to accept this view. Observation of a few facts is convincing of its truth. The phenomena of movement, already mentioned, are the strongest proof of the liquid nature of protoplasm. In the protoplasmic strands of plant-cells an
. General physiology; an outline of the science of life. . Fig. 34.—ft, Vaucheria tube cut open at the upper end ; the protoplasm is flowing out and taking the form of globules. (After PfefEer.) b, Aniasia-cOl containing a pale racuole and various small fat-droplets. liquid nature of the cell-contents, and no investigator who is familiar with the phenomena need hesitate to accept this view. Observation of a few facts is convincing of its truth. The phenomena of movement, already mentioned, are the strongest proof of the liquid nature of protoplasm. In the protoplasmic strands of plant-cells and in the pseudopodia of Bhizopoda the living substance may be seen flowing like the water of a quiet stream, now slower, now faster, and in different places at unequal rates, so that, as can be observed easily in the constituents enclosed within the ground-mass, the granules, fat-droplets, etc., the particles continually mingle with one another. How would it be possible for a stiff ground-mass to flow like water in a stream ? Another thing that throws light upon the liquid consistency of protoplasm is the fact that protoplasmic masses, when oozing out of the cell after its walls have been crushed or cut,/orm drops and globules. The formation of such drops and globules can be observed very beautifully in the protoplasm of the alga Vaucheria. 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 Verworn, Max, 1863-1921; Lee, Frederic S. (Frederic Schiller), 1859-1939. London, Macmillan and co. , limited; New York, The Macmillan company
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