. Student's manual of electro-therapeutics, embodying lectures delivered in the course on therapeutics at the Woman's medical college of the New York infirmary. which consists of a disk of hard rubber revolv-ing on a shaft, which is bound with a tire ofbrass (t/ t) in which two breaks occur. Foursprings (s s s s) press firmly againstthis tirein such a way that two of them, when the but- GALVANISM. n ton is rotated, jump over the gaps and come incontact with the opposite half of the tire. For instance, in fig. 7 the current leaves thepositive pole + traverses spring s, runs aroundthe right half
. Student's manual of electro-therapeutics, embodying lectures delivered in the course on therapeutics at the Woman's medical college of the New York infirmary. which consists of a disk of hard rubber revolv-ing on a shaft, which is bound with a tire ofbrass (t/ t) in which two breaks occur. Foursprings (s s s s) press firmly againstthis tirein such a way that two of them, when the but- GALVANISM. n ton is rotated, jump over the gaps and come incontact with the opposite half of the tire. For instance, in fig. 7 the current leaves thepositive pole + traverses spring s, runs aroundthe right half of the tire t, through the spring s Fig. 8. to the binding post 1. Then, if the circuit beclosed, across to post 2, back to spring s,around the left half of the brass tire t, through 24 ELECTRO-THERAPEUTICS. the spring s to the negative pole. This willmake i, the positive pole, 2, the negative the button is turned to occupy the positionindicated by the dotted arrow, it is easy to seethe polarity of the posts will be reversed—;?.,the current will run from + directly to 2 andfrom 1 straight back to —. This split button is covered, in most batteries,and is turned by a handle or winch whichshould always point, as does the arrow, in fig. 7,toward the positive pole. There should be twobinding posts (1 and 2), which should be madeto hold the rheophores or conductors by meansof screws. Dial collectors, a pole changer, and two bind-ing posts are the only fixtures that should be ona portable galvanic battery. Do not combine a galvanic and faradic batteryin the same case. Of Accessories to a galvanic battery thereare seve
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Keywords: ., bookcentury1800, bookdecade1880, bookid390020112100, bookyear1884
