. Electro-physiology. Electrophysiology. FIG. 176. (After Griitzner.) FIG. 175. rotating round the axis A, then when they have shifted ^ revolution clockwise from this position, so that / is opposite N, the first current rises gradually from 0. If / is then moved away from N, the falling current alters instantaneously in the reverse direction. Rising suddenly, it gradually falls to zero, and then rises again equally gradually to its former height, as the coil / travelling through all three quadrants approaches S, the south pole. This is succeeded by an abrupt rise of current in the reverse dir
. Electro-physiology. Electrophysiology. FIG. 176. (After Griitzner.) FIG. 175. rotating round the axis A, then when they have shifted ^ revolution clockwise from this position, so that / is opposite N, the first current rises gradually from 0. If / is then moved away from N, the falling current alters instantaneously in the reverse direction. Rising suddenly, it gradually falls to zero, and then rises again equally gradually to its former height, as the coil / travelling through all three quadrants approaches S, the south pole. This is succeeded by an abrupt rise of current in the reverse direction, so that (as shown by the accompanying curves, Fig. 176) two gradually and two abruptly rising currents appear with each revolution. This can be elegantly demonstrated (after Griitzner) if the platinum-point electrodes are drawn at uniform speed over paper moistened with iodide of potassium during the revolution of the apparatus. The resulting electrolytic curves appear as lines which are correspondingly thicker at the apexes of the curves than in the rest of the tracing. The gradually rising currents are represented by lines, small at first, and after-. 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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