. A text-book of comparative physiology for students and practitioners of comparative (veterinary) medicine. Physiology, Comparative. Fig. 166.—Du Boie-Reymond's mductorium (after Roeenthal). i, secondary coil; c, primary coil; 6, electro-magnet; A,armature of hammer; /, email movable screw. The current from battery, ascending metal pillar, passes along hammer, and by Bcrew gets into primary coil, thus inducing current in secondary coil. By con- nection between primary coil and wires around soft iron of 6, iron becomes a maig- net, hammer is attracted from screw/, and current thus broken; but
. A text-book of comparative physiology for students and practitioners of comparative (veterinary) medicine. Physiology, Comparative. Fig. 166.—Du Boie-Reymond's mductorium (after Roeenthal). i, secondary coil; c, primary coil; 6, electro-magnet; A,armature of hammer; /, email movable screw. The current from battery, ascending metal pillar, passes along hammer, and by Bcrew gets into primary coil, thus inducing current in secondary coil. By con- nection between primary coil and wires around soft iron of 6, iron becomes a maig- net, hammer is attracted from screw/, and current thus broken; but when this occurs, soft iron ceases to be a magnet necessarily, and, hammer springing back, the whole course of events is repeated. This may occur several hundred times in a second. The above may be clearer from diagram, Fig. 167. By sliding second- ai7 coil up and down, strength of induced cuiTent can be graduated. may be effected. The apparatus consists essentially of a pri- mary coil, secondary coil, magnetic interrupter, and a scale. PiQ. 167.—Diagrammatic representation of the working of rig. 166 (after Hosenthal).. 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 Mills, Wesley, 1847-1915. New York, Appleton
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