. Electro-physiology. Electrophysiology. XI ELECTRICAL FISHES 435 being led through wires to the galvanometer circuit, which includes O O G3 the frog-interrupter (Gu). Two copper electrodes (EE^) are further placed in the frog-trough, their wires being connected with the muscle (GJ of the frog-alarum and (Gn) of the frog-interrupter. The first was directly excited, owing to the force of the shock from the gymnotus, the last indirectly, from the nerve, by means of the exciting reed. " With the reverser placed as in the figure, the lever of the inter- rupter forms part of the experimental c
. Electro-physiology. Electrophysiology. XI ELECTRICAL FISHES 435 being led through wires to the galvanometer circuit, which includes O O G3 the frog-interrupter (Gu). Two copper electrodes (EE^) are further placed in the frog-trough, their wires being connected with the muscle (GJ of the frog-alarum and (Gn) of the frog-interrupter. The first was directly excited, owing to the force of the shock from the gymnotus, the last indirectly, from the nerve, by means of the exciting reed. " With the reverser placed as in the figure, the lever of the inter- rupter forms part of the experimental circuit. The arrows show the direc- tion of current. With the reverser turned over, the lever makes the shunt circuit; this distribution of current corresponds with the dotted ; Gotch has recently employed another and widely applicable method in his numerous experiments in time- measurement on the torpedo. The apparatus is essentially modelled after du Bois-Reymond's spring-myograph. Three contacts (Kl K^ K^, which are opened in succession by the trigger, were connected as in Fig. 275. K^ opens the primary circuit of an in- duction coil, the break shock being passed into the nerve of an organ- preparation. A corresponding part of the discharge that follows acts upon the galvanometer when the opening of K abolishes a shunt to the galvanometer circuit. Lastly, the latter is permanently opened (by JT3), so that the discharge from the organ only acts upon the galvanometer for the period between the opening of and K.,. The trigger shoots past so rapidly that this interval may be reduced to O'OOl". Hence if K, is opened O'Ol" after Kv while KZ is gradually withdrawn from K^ the effect on the galvanometer will be perceptible Ttj{jV' after tne stimulation. FIG. 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 resem
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Keywords: ., bo, bookcentury1800, bookdecade1890, bookpublisherlondonmacmillan
