. A treatise on nervous and mental diseases, for students and practitioners of medicine. to one of these wires the electrodeof Fig. 00, and this is to be placed upon the neck. We then attachtlie other wire the electrode of Figs. 67 or 68 ; this is to be i)]n((d uponthe forehead. The electrodes will have been covered with absorbentcotton in the way that has been described, so as to carefully preventany contact of the skin with the sluirp (>dges of the cop]iei. The 106 INTRODUCTORY, skin of the neck and forehead is now carefully wetted with the sponge,wrung out of hot water so as not to drip.
. A treatise on nervous and mental diseases, for students and practitioners of medicine. to one of these wires the electrodeof Fig. 00, and this is to be placed upon the neck. We then attachtlie other wire the electrode of Figs. 67 or 68 ; this is to be i)]n((d uponthe forehead. The electrodes will have been covered with absorbentcotton in the way that has been described, so as to carefully preventany contact of the skin with the sluirp (>dges of the cop]iei. The 106 INTRODUCTORY, skin of the neck and forehead is now carefully wetted with the sponge,wrung out of hot water so as not to drip. The electrodes are thor-oughly wet with hot water, and quickly squeezed out so that they willnot become dry or cold. The neck electrode is then put in place,and curved carefully in such a way as to follow the muscular con-formation of the neck without unpleant pressure, and yet so thatit shall set firmly. The physician then places the other electrodecarefully over the brow, gently shaping it. These two electrodesare now committed to the care of some person who has a steady Fig. Battery table showing arrangement of galvanic and faradic apparatus, rheostat, and milliamperemeter. hand and who is carefully instructed to place the hand upon theneck electrode firmly and yet gently, and to hold the foreheadelectrode gently and firmly in place by means of the attendant must not touch the copper of the two electrodes,or else the circuit will be diverted through his or her body, anda shock will be given to the patient. When the electrodes arein place, the current collectors are turned to the binding-postsso as to permit the passage of a current. Now the screw ofthe rheostat is gently screwed down until it is felt that someresistance is being encountered to the revolutions of the screw,and then the screwing should be done very carefully, whilst theeye is kept upon the milliampere-meter to see by the fluctuation ofthe needle whether the current has begun to pass. It shoul
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