. Electricity : its medical and surgical applications, including radiotherapy and phototherapy . The ^icto^ electrocautery with Pj-nchons pneumomassage pump. work (Fig. 61); the transformer may be so made that it can be used fornasal drill or saw, for vibratory massage, and for ear pump for earmassage (Fig. 290). Alternating Street Current.—A reducer (p. 87) is necessary for combination transformer is manufactured to supply cautery, a diag-nostic lamp, nasal saw and drill, vibratory massage, and ear pump. SOURCE AND CONTROL OF CURRENT 339 Storage Battery.—The storage battery or accum
. Electricity : its medical and surgical applications, including radiotherapy and phototherapy . The ^icto^ electrocautery with Pj-nchons pneumomassage pump. work (Fig. 61); the transformer may be so made that it can be used fornasal drill or saw, for vibratory massage, and for ear pump for earmassage (Fig. 290). Alternating Street Current.—A reducer (p. 87) is necessary for combination transformer is manufactured to supply cautery, a diag-nostic lamp, nasal saw and drill, vibratory massage, and ear pump. SOURCE AND CONTROL OF CURRENT 339 Storage Battery.—The storage battery or accumulator is also satis-factory (p. 59), and the various types of cells (pp. 54 to 59) may beemployed. When cells are used they must be arranged in parallel (p. 61).Therefore the battery used for ordinary therapeutic purposes, in whichthey are in series, will not answer. The preferable cell is the bichromate(p. 56). Such a battery is shown in Figs. 143, 291, and 292. Fig. 291. Combination portable battery. Control of Current.—To control the electric current, various controllers,transformers, and meters are employed, singly or mounted in cabinetsor upon switchboards, which are described on pages 158 to 160. Switchboards of many forms are on the market, equipped with con-trollers, transformers, and milliampere meters. The more elaboratecan be connected with the 110-volt direct current to furnish galvanicand faradic current, power for surgical drill, ear massage pump, andfor cautery and diagnostic lamp (Fig. 109). The electric current has been adapted for the aurist and laryngologist 340 DISEASES OF THE THROAT, NOSE, AND EAR in so many ingenious ways that, in order to speak of them all, it is neces-sary to be as brief as possible, giving only practical details. As thesubject has many branches, it will be discussed under four general heads: Fig. 292 Ife^B mmuimlUMSs
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