The electro-therapeutic guide, or, A thousand questions asked and answered . lectrolyte. A strong acid willattack zinc more powerfully than a weak acid, or an alkali. It would also be made weaker if the zinc was covered with salts, ornearly destroyed, or not properly amalgamated, or by the length of timein use. The voltage depends largely on the number of cells used. We canvary the voltage by adding cells. The voltage of a battery depends on thenumber of cells, not on the size of the cells. Every cell has a certain volt-age, no matter what the size of the cell. Different kinds of cells, with d
The electro-therapeutic guide, or, A thousand questions asked and answered . lectrolyte. A strong acid willattack zinc more powerfully than a weak acid, or an alkali. It would also be made weaker if the zinc was covered with salts, ornearly destroyed, or not properly amalgamated, or by the length of timein use. The voltage depends largely on the number of cells used. We canvary the voltage by adding cells. The voltage of a battery depends on thenumber of cells, not on the size of the cells. Every cell has a certain volt-age, no matter what the size of the cell. Different kinds of cells, with diff-erent kinds of elements, and different electrolytes have difterent thing else being equal, the voltage of a cell the size of a barrel is nogreater than the voltage of a cell the size of a gun cap. The accompanying sketch shows four cells connected together in seriesfor voltage. The carbon of the first cell, connected to the zinc of the second,the carbon of the second to the zinc of the third, and the carbon of the third THE EIvECTRO-THERAPEUTIC GUIDE 33. LLS WIF^ E D VOLTS to the zinc of the fourth. Then the wires from the zinc of the first cell andfrom the carbon of the fourth cell have four times the voltage, or power ofovercoming resistance, in an outside circuit, than would the wires from anyone cell. The current strength of the four cells is no greater than that ofone cell, but as we have shown by Ohms law, increased voltage overcomesmore resistance, allowing greater amperage to pass through the resistance. AMPERAGE MODIFICATIONWhat is amperage, and how modified? Amperage is the quality of current and it is modified by the size of theelements, the depth of their immersion in the electrolyte, their nearness toeach other, and the amount of resistance in the circuit. The number ofcells added, increases the amperage by enlarging the amount of area ofthe elements exposed to chemical action, when they are connected in par-allel, that is, all zincs connected to
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