General physiology; an outline of the science of life . y __j. Pig. 31.âCells containing different forms of nuclei, a, Vorticella, a ciliate infusorian, possessing arod-shaped nucleus. 6, Stentor, a ciliateinfusorian, possessing a monilif orm nucleus, c, c, Cellsof the spinning-glands of the caterpillar possessing antler-like branched nuclei. (AfterKorschelt.) different constituents that may be distinguished from one anothermicroscopically more or less clearly, and all of which are notpresent in all cells at all times. Because of the exceeding minute-ness of the objects, it is often difficult
General physiology; an outline of the science of life . y __j. Pig. 31.âCells containing different forms of nuclei, a, Vorticella, a ciliate infusorian, possessing arod-shaped nucleus. 6, Stentor, a ciliateinfusorian, possessing a monilif orm nucleus, c, c, Cellsof the spinning-glands of the caterpillar possessing antler-like branched nuclei. (AfterKorschelt.) different constituents that may be distinguished from one anothermicroscopically more or less clearly, and all of which are notpresent in all cells at all times. Because of the exceeding minute-ness of the objects, it is often difficult sharply to characterise theindividual constituents. Therefore, their identity in two separatespecies is not always beyond doubt, and extended investigationsare still needed before it will be known clearly what constituents LIVING SUBSTANCE 91 of one nucleus correspond exactly to those of another. Neverthe-less, a number of constituents, which apparently are wide-spread,are even now fairly well characterised. The following substancesoccur most constantly:â
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