. General physiology; an outline of the science of life. Fig. -Galvanotaxis of Poli/toriui uvella. A, Resting quietly ; B, swimming toward the anode after tlie making of tlie constant current. are so pleasing and graceful as the galvanotactic dance of the Infusoria. A third form of galvanotaxis is shown by the ciliate infusoriau Spirostomuni amhiguum} If these elongated Infusoria, which can be perceived even with the naked eye as small white fibres c. 2 mm. in length, be placed in water between parallel clay-electrodes, it is seen that upon the making of the constant current they draw to
. General physiology; an outline of the science of life. Fig. -Galvanotaxis of Poli/toriui uvella. A, Resting quietly ; B, swimming toward the anode after tlie making of tlie constant current. are so pleasing and graceful as the galvanotactic dance of the Infusoria. A third form of galvanotaxis is shown by the ciliate infusoriau Spirostomuni amhiguum} If these elongated Infusoria, which can be perceived even with the naked eye as small white fibres c. 2 mm. in length, be placed in water between parallel clay-electrodes, it is seen that upon the making of the constant current they draw together suddenly by the sudden contraction of their mypid-fibres, but do not, as might perhaps be expected, swim toward one or the other pole. Instead of this, by means of their ciliary motion accompanied by much bending of the body, they gradually turn so. FjG. 235.—Galvanotaxis of Spirostomum ambiguum. After the making of the currentthe liu,i^orat place themselves with their long axis at right angles to the direction of the cmrent that their long axes are at right angles to the direction of the current, and maintain this position, although constantly bending and twitching their long bodies (Fig. 235). This form of gal- vanotaxis may be termed transverse. In other organisms trans- 1 Cf. Verworn {'92, "96).. 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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