. Electro-physiology. Electrophysiology. FIG. 9S.—Pdoini/.m palttstris. Polar excitation effects with passage of a constant current. (Verworn.) stant currents of brief duration, is particularly striking; at a given current strength only a kathodic break excitation is obtained, whereas with currents of longer duration an « malic make excita- tion makes its appearance. The effects are thus contrary to those obtained on muscle, not only as regards the law of polar excitation, but also as regards the manner in which make and break excitation depend upon the duration of the exciting current. Variou
. Electro-physiology. Electrophysiology. FIG. 9S.—Pdoini/.m palttstris. Polar excitation effects with passage of a constant current. (Verworn.) stant currents of brief duration, is particularly striking; at a given current strength only a kathodic break excitation is obtained, whereas with currents of longer duration an « malic make excita- tion makes its appearance. The effects are thus contrary to those obtained on muscle, not only as regards the law of polar excitation, but also as regards the manner in which make and break excitation depend upon the duration of the exciting current. Various forms of Amceba, investigated by Verworn (A. Umax, irrrucosa, and diffluens), exhibited some apparently considerable divergences from the phenomena observed on Pelomyxa : at any rate with the strength of current made use of, instead of the destruction of the anodic pole of the body, a protrusion (forma- tion of pseudopodia) was produced at the kathodic pole. At make. 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 Biedermann, W. (Wilhelm), 1852-1929; Welby, Frances A. (Frances Alice). London : Macmillan
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