An international system of electro-therapeutics : for students, general practitioners, and specialists . Gaiffe instrument(Fig. 8), a neat box no larger than an octavo book, with two smallsulphate-of-mercury cells, L, and with fixed coils, M, the core serving asattractor for the spring interrupter, P, the current-force being varied bythe sliding tube, B. Extra and induced current, or both united, can beutilized from the connections in U by brass sponge-holders, N, or themetal electrodes, T. The battery-salt is carried in the bottle, K. Sim-ilar small instruments are made in the United States.
An international system of electro-therapeutics : for students, general practitioners, and specialists . Gaiffe instrument(Fig. 8), a neat box no larger than an octavo book, with two smallsulphate-of-mercury cells, L, and with fixed coils, M, the core serving asattractor for the spring interrupter, P, the current-force being varied bythe sliding tube, B. Extra and induced current, or both united, can beutilized from the connections in U by brass sponge-holders, N, or themetal electrodes, T. The battery-salt is carried in the bottle, K. Sim-ilar small instruments are made in the United States. (b) The instrument most generally used is the box-battery. This isof moderate size and so arranged that it is portable, and j^et can be madeso complete that it answers all purposes and is in general use as an officeinstrument. These box-batteries vary greatly in size and perfection ofconstruction, and are all equally serviceable for purposes of irritation orstimulation ; yet the great majority of instruments do not admit of anyother variation of current than in strength, as they have only the spring. Fig. 8.—Pocket-Battery. interrupter, which cannot be adjusted sufficiently to admit of a physio-logical variation of current, and they mostly have but one secondarycoil, and that of no great length of wire, thus giving a sharp of tlie most perfect of these instruments is the box-battery (Fig. 9)constructed in accordance with my earlier suggestions, and possessingcontrollable contact-breakers, which are well adapted for current-inter-ruptions within moderate limits, and of greater variability than in otherinstruments. We see the three coils, one in use and two others stowedaway in the receiver, and three contact-breakers; the rapidly-vibratingspring, adjustable by the screw-head, D; the slow interrupter, whosebeats are varied by the screw, C, and the single impulse-key, H. Thegalvanic flow is established by inserting the zinc, F, into the adjoiningbichromate-of-potash
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectuterus, bookyear1894
