. General physiology; an outline of the science of life. . 1. .07.—A, Aiiiieha. A pale (.niitractile vacuole lies in the cndoplasm beside the dark nucleus B, Paniiiui-xiinn. At each pole is a star-shaped contractile vacuole ; the upper is in the act of contracting, while the lower is beginning to fill itself from several small drops of liquid that are flowing together. was suggested by Traube, and was much discussed in his time. If a drop of a thick solution of gelatine be allowed carefully to fall into a solution of tannin, there appears about the drop a so-called precipitation-membrane of ge
. General physiology; an outline of the science of life. . 1. .07.—A, Aiiiieha. A pale (.niitractile vacuole lies in the cndoplasm beside the dark nucleus B, Paniiiui-xiinn. At each pole is a star-shaped contractile vacuole ; the upper is in the act of contracting, while the lower is beginning to fill itself from several small drops of liquid that are flowing together. was suggested by Traube, and was much discussed in his time. If a drop of a thick solution of gelatine be allowed carefully to fall into a solution of tannin, there appears about the drop a so-called precipitation-membrane of gelatine tannate, since at the surfaces of contact of the gelatine and the tannin the two substances undergo a chemical combination.' This precipitation-membrane shows the peculiar phenomena of growth both in surface and in thickness, and on account of its similarity to a living cell Traube's drop of gelatine in the tannin solution has been termed an " arti- ficial ; Since the gelatine solution attracts water to itself, tannin in solution comes constantly through the membrane to the. 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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