The nursing and care of the nervous and the insane . DIAGRAM OF COMMUTATOR. pole. This will make 1 the positive pole, 2 the nega-tive pole. If the button is turned to occupy the posi-tion indicated on the dotted arrow, it is easy to see thepolarity of the posts will be reversed,—, the currentwill run from the + directly to 2, and from 1 straightback to —. This split bottom is covered in most batteries, andis turned by a handle or winch, which should always 86 THE NURSING AND CARE OF point as does the arrow in Fig. 9,—towards the positivepole. There should be two binding posts, which should
The nursing and care of the nervous and the insane . DIAGRAM OF COMMUTATOR. pole. This will make 1 the positive pole, 2 the nega-tive pole. If the button is turned to occupy the posi-tion indicated on the dotted arrow, it is easy to see thepolarity of the posts will be reversed,—, the currentwill run from the + directly to 2, and from 1 straightback to —. This split bottom is covered in most batteries, andis turned by a handle or winch, which should always 86 THE NURSING AND CARE OF point as does the arrow in Fig. 9,—towards the positivepole. There should be two binding posts, which shouldbe made to hold the rheophores or conductors bymeans of screws. Fio. COMMUTATOR SWITCH. The nurse should have always in mind certain pointsabout the care of the battery. She should be carefulabout spilling the fluid of the battery, for this is is sometimes some difficulty in letting the cellsdown or lifting them. Under such circumstances noth-ing can be accomplished by force. If rough, the opera- THE NERVOUS AND THE INSANE. 87 tor will be likely to break or spill something. With alittle careful manipulation the rod slips down withoutany difficulty. On the whole, I think it is better for nurses never touse the galvanic current to the head or neck. Certainlythey should not do this unless the instructions whichthey have received have been very explicit, and withreference to the particular case which is being it is recalled that a great French physician, one ofthe founders and best exponents of electro-therapeutics,instantaneously destroyed the sight of one of his pa-tients by an incautious galvanic application, the neces-sity, aye,
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