. Principles of electro-medicine, electro-surgery and radiology : a practical treatise for students and practioners, with chapters on mechanical vibration and blood pressure technique . l to the carbon of the next, until all are connected. If, however, it is desired to use the current for heating platinum elec-trodes or cautery work, it is necessary to obtain a high amperage and alow voltage. This is obtained by connecting the cells in multiple orparallel, by joining like elements together; that is, zinc of all the cellstogether and all the carbons together. The voltage of a battery in which t
. Principles of electro-medicine, electro-surgery and radiology : a practical treatise for students and practioners, with chapters on mechanical vibration and blood pressure technique . l to the carbon of the next, until all are connected. If, however, it is desired to use the current for heating platinum elec-trodes or cautery work, it is necessary to obtain a high amperage and alow voltage. This is obtained by connecting the cells in multiple orparallel, by joining like elements together; that is, zinc of all the cellstogether and all the carbons together. The voltage of a battery in which the cells are connected in series, isthe sum of the voltage of all the cells connected, but the amperage out-put is equivalent only to the output of one cell; while with the cellsconnected in multiple or parallel it is the opposite. For example: If we have a five-cell battery, and if each of thesecells gives a pressure of l1/? volts and a current strength of 5 amperes,then by connecting these cells in series, we will have in the circuit a cur-rent of 5 amperes at 7% volts pressure, while by connecting the cells inmultiple or parallel, a current of 25 amperes at 1% volts Fig. 3—Cells connected in parallel. By arranging some of the cells in series, and some of them in par-allel, we are able to obtain any voltage or amperage required. Dry Cells are made on the same principle as the Laclanche or wetcells, with the exception that the electrolyte is in the form of a paste orcream instead of a liquid. Being more convenient than the wet cells,they are extensively used in portable batteries. Polar Effects The two poles (positive and negative) of the galvanic current pro-duce on the tissue of the body certain physical, chemical and physiolo-gical effects, diametrically opposite to each other (so that if the ap-plication of the positive pole was indicated, the negative would surelydo harm), and the following outline of the polar effects on the tissue isthe gist of what the phy
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectelectri, bookyear1917
