. International record of medicine . ch in diameter. A NEW PORTABLE DRY-CELL FARADAIC BATTERY OF SMALL SIZE AND GREAT POWER. By Frederick Peterson, M. D. I HAVE recently had made for me by H. E. Stammers, of 1,424Broadway, a faradaic battery which has unusual advantages. It is sosmall as to be carried in ones hand-bag among other instruments withthe greatest ease. It is smaller than the apparatus of Gaiffe, which isgenerally known a pocket battery. It is more powerful than theGaiffe, for it has four cells, while the latter has but two; and it iscleaner, since no fluid has to be added befor
. International record of medicine . ch in diameter. A NEW PORTABLE DRY-CELL FARADAIC BATTERY OF SMALL SIZE AND GREAT POWER. By Frederick Peterson, M. D. I HAVE recently had made for me by H. E. Stammers, of 1,424Broadway, a faradaic battery which has unusual advantages. It is sosmall as to be carried in ones hand-bag among other instruments withthe greatest ease. It is smaller than the apparatus of Gaiffe, which isgenerally known a pocket battery. It is more powerful than theGaiffe, for it has four cells, while the latter has but two; and it iscleaner, since no fluid has to be added before it is used. The cells arethose made by the Chloride of Silver Dry-Cell Company, of Baltimore,and will last one hundred hours. The battery then has the valuablequalities of those invented by Barrett—viz., great durability, dryness,cleanliness, and diminutive size. The illustration (Fig. 1) gives itsgeneral form and appearance. The ends are square, 2^ by 2, inches,and the length about 5^ inches. The illustration, therefore, may be. The primary coil consists of layers of No. 25 copper wire. The secondary coil consists of fourteen layers of No. 36 copperwire. The four chloride-of-silver cells are connected, two in multiple arcand two in series. The vibrator makes a sliding connection, changing the point of co-aptation, thereby cleaning itself. The case is neatly covered with Russia leather. It is particularly serviceable to any one who makes use of electricityto any great extent outside of his ofiice, either for diagnosis or fortreatment. The muscular contractions produced are powerful. Rheo-phores and electrodes are carried in the hand-bag and not in the bat-
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectmedicine, bookyear186
