. The cell; outlines of general anatomy and physiology. membrane, is,comparatively speaking, atrest. In the second place,the whole body of proto-plasm itself slowly movesalong, in consequence ofwhich it changes its bands become nar-rowed, and may after atime disappear, delicatethreads increase in size, andnew processes are formed,just as new pseudopodiaare protruded to the ex-terior by Myxomycetes andlihizopoda. Large massesof protoplasm becomeheaped up here and thereupon the layer lining thecell-wall, whilst at otherplaces the coating becomesthinner. c. Theories concerning Protopla
. The cell; outlines of general anatomy and physiology. membrane, is,comparatively speaking, atrest. In the second place,the whole body of proto-plasm itself slowly movesalong, in consequence ofwhich it changes its bands become nar-rowed, and may after atime disappear, delicatethreads increase in size, andnew processes are formed,just as new pseudopodiaare protruded to the ex-terior by Myxomycetes andlihizopoda. Large massesof protoplasm becomeheaped up here and thereupon the layer lining thecell-wall, whilst at otherplaces the coating becomesthinner. c. Theories concerning Protoplasmic have lately been made by various investigators, Quincke(III. 17), Biitschli (II. 7b), Berthold (III. 2), and others, to com-pare these protoplasmic movements with those exhibited by amixture of inorganic substances, and thus to explain them. Quincke has carefully investigated the movements which occurat the areas of contact of various fluids. He placed in a glasscontaining water a drop of a mixture of almond oil and chloroform,. Fig. 41.—A B, cells of a staminal hair of Tra-descantia virginica. A Undisturbed streamingmovements of protoplasm. B Protoplasm whichhas run together into ball-like masses in con-sequence of irritation : a cell-wall, b transversewall of two cells ; c d protoplasm which hasmassed itself together into small balls. (AfterKiihne ; from Verworn, Fig. 13.) 74 THE CELL the specific gravity of which is slightly greater than that ofwater, and then, by means of a fine capillary tube, he caused adrop of 2 per cent, solution of soda to approach the globuleof oil. This latter then exhibited changes in shape, which aresimilar to those observed with the microscope in certain explanation of this is that the soda solution graduallyspreads itself out over the surface of the oil, forming a soap. Quincke is of opinion that the protoplasmic movements areanalogous to these. In the plasmolysis of plant cells, the proto-plasm frequently br
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