. Electro-physiology. Electrophysiology. IX ELECTRICAL EXCITATION OF NERVE 129 desired rate—within a certain range, and in exact proportion with the time-interval. The apparatus, which is constructed on the principle of Wheatstone's Bridge, consists essentially of a homogeneous circular conductor (trough filled with ZuS04 solution). The current is led in at a b, the opposite ends of a diameter. _ A. PIG. 181.—Schema of v. Fleischl's orthorheonome. (Ellenberger, Physiologic, ii.) metal conductor turning on its centre runs across diametrically (Fig. 181, zz), its two points with amalgamated zinc
. Electro-physiology. Electrophysiology. IX ELECTRICAL EXCITATION OF NERVE 129 desired rate—within a certain range, and in exact proportion with the time-interval. The apparatus, which is constructed on the principle of Wheatstone's Bridge, consists essentially of a homogeneous circular conductor (trough filled with ZuS04 solution). The current is led in at a b, the opposite ends of a diameter. _ A. PIG. 181.—Schema of v. Fleischl's orthorheonome. (Ellenberger, Physiologic, ii.) metal conductor turning on its centre runs across diametrically (Fig. 181, zz), its two points with amalgamated zinc terminals dipping into the trough E. The nerve is included in the circuit of this rotating diameter (between c d). As often as it is in the direction of the entrance points of the current AB, a certain fraction of the current will pass through it; while at an angle of 90° (at CD} this fraction = 0. The current through the nerve diminishes regularly with the magnitude of the angle («), provided FIG. 182. the resistance of the circuit is otherwise vanishing. Von Fleischl showed that, with regular rotation of the rheonome, the oscillations of current might be expressed in a broken line similar to Fig. 182. Equal sections of the abscissa correspond with equal times, while the ordinates are proportional with strength of VOL. II K. 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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Keywords: ., bo, bookcentury1800, bookdecade1890, bookpublisherlondonmacmillan
