The nursing and care of the nervous and the insane . scales by which theprimary and secondary currents may be graduated tothe utmost delicacy or greatest power, and with a specialform of galvanic cell. This cell is so made that whennot in action the zinc is raised out of it altogether, andthe aperture through which it passes covered with apiece of rubber called a hydrostat, making the cellfluid-tight, and saving both the zinc and fluid fromthe effects of splashing in transportation, or of im-mersion in case of an upset. By this plan also thecell can be filled to the top and the zinc be made tw
The nursing and care of the nervous and the insane . scales by which theprimary and secondary currents may be graduated tothe utmost delicacy or greatest power, and with a specialform of galvanic cell. This cell is so made that whennot in action the zinc is raised out of it altogether, andthe aperture through which it passes covered with apiece of rubber called a hydrostat, making the cellfluid-tight, and saving both the zinc and fluid fromthe effects of splashing in transportation, or of im-mersion in case of an upset. By this plan also thecell can be filled to the top and the zinc be made twicethe usual length, thus producing a stronger current andlasting a longer time. 6g THE NURSING AND CARE OF The Dubois-Reyniond coil is provided with slow andrapid interrupters, with switch for making connectionswith the primary and secondary currents, and withscrew for regulating the tension of the currents. Itis connected with a cell under the table or elsewhere. Let me now give somewhat explicit and detailed Fig. 4. Primary Coil. Secondary DUBOIS-REYMOND COIL. IMPROVED BY FLEMMINO. directions as to the methods of using a faradic some these directions may seem almost too detailedand particular, but they are important matters whichbelong to the province of the nurse. To start a faradic current is a simple matter, and yetI have seen it bother a nurse or untrained doctor. Bat-teries by different manufacturers are started in somewhatdifferent ways, but all are on the same general the method of starting one, the nursewill probably have no trouble with another. The cellmust be in good working order. Many faradic ma- THE NERVOUS AND THE INSANE. 69 chines have a sliding rod with a joint attached to thezinc, by which rod, when not in use, the zinc may bedrawn up, and then kept from slipping back by bend-ing the rod at the joint. The objection to this arrange-ment is that it necessitates a small zinc which will notendure well. In the Flemming b
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