. Practical electricity in medicine and surgery. ordinary batteriessold for physicians use. This battery is provided with threecoils of different-sized wires, and different resistances, which aremarked upon the coils. These coils are termed, respectively, FAEADIC BATTERIES. 231 coarse, fine, and medium. According to Dr. Engelmann, thecoarse coil should he used for muscular contractions, and to pro-duce contraction of the uterus when in a condition of subinvo-lution, the fine coil to relieve the pain in cellulitis, and themedium to produce muscular contractions when the parts aretoo sensitive t
. Practical electricity in medicine and surgery. ordinary batteriessold for physicians use. This battery is provided with threecoils of different-sized wires, and different resistances, which aremarked upon the coils. These coils are termed, respectively, FAEADIC BATTERIES. 231 coarse, fine, and medium. According to Dr. Engelmann, thecoarse coil should he used for muscular contractions, and to pro-duce contraction of the uterus when in a condition of subinvo-lution, the fine coil to relieve the pain in cellulitis, and themedium to produce muscular contractions when the parts aretoo sensitive to permit the use of the coarse coil. This batterywas primarily designed for use in gynaecological cases; but everypractitioner conversant with the effects of faradic electricitywill see indications for the use of the different coils. It is earn-estly to be desired that careful observations should be made withthis apparatus. A faradic battery, which can be readily carried in the coat-pocket, is made by (jaiffe, of Paris, and by several American. Fig. 191.—Uaiffes Faradic Pocket Battery. firms. The galvanic current is furnished by two small carbontrays, representing the carbon element, and two flat, squareblocks of zinc for the positive element. The exciting fluid issolution of mercury bisulphate. A current of considerable in-tensity can be obtained from this little instrument, and it mayoften be employed to advantage. ACCESSORY APPARATUS. Current Selector.—Every battery should be so arranged thatany one cell, or any number of cells can be thrown into circuitwhen wanted. In many of the stationary apparatuses nowbefore the profession the current selector or switch is defectivein this particular, there being no way of picking out cells in the 232 PRACTICAL ELECTRICITY IN MEDICINE AND SURGERY. series, unless the first cells are also included. Most recentdevices have this defect corrected. Purchasers of stationaryelectrical apparatus should insist upon being furnished with thefor
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectelectri, bookyear1890
