. A-B-C of electricity. metal and carbon,in a battery are called the elements, andto these are connected the wires which leadfrom the battery to the instruments to beworked by it. The Leclanche Battery.—This form of open-circuit battery consists of a glass jar in whichis placed the elements. One element con-sists of a rod of zinc, and the other elementis carbon and powdered black oxide ofmanganese. These two (the carbon andblack oxide of manganese) are placed in anearthenware vessel called a porous is simply a small jar made of claywhich is not glazed. Thus, the liquid whichis in the
. A-B-C of electricity. metal and carbon,in a battery are called the elements, andto these are connected the wires which leadfrom the battery to the instruments to beworked by it. The Leclanche Battery.—This form of open-circuit battery consists of a glass jar in whichis placed the elements. One element con-sists of a rod of zinc, and the other elementis carbon and powdered black oxide ofmanganese. These two (the carbon andblack oxide of manganese) are placed in anearthenware vessel called a porous is simply a small jar made of claywhich is not glazed. Thus, the liquid whichis in the glass jar penetrates through theporous cup to the carbon and manganesewhich it contains, and so the chemicals affectboth these and the zinc at once, for, in orderto obtain electricity, you will remember thatthe chemical action must take place at thesame time upon both the elements in thesame vessel. (Fig. 29.) The chemical substance used in this bat-tery is sal-ammoniac, or salts of ammonia. 7 97 A-B-C OF ELECTRICITY. A certain quantity of this salt is dissolvedin water, and this solution is poured into theglass jar. When this is done the battery willgenerate electricity at once. It should be remembered that the properterm for the chemicalmixture which acts uponthe elements in any bat-tery is electrolyte. The Dry Battery.—The cleanliness, conven-ience, high efficiency,and comparatively lowinternal resistance of thedry cell has brought itinto great favor in thelast few years. It isnow extensively used inpreference to theLeclanche and otheropen - circuit batterieshaving liquid electrolytefor light work, such as bells, gas-lighting,burglar alarms, ignition on motor-boats,automobiles, etc. The dry cell is also used in great numbersfor pocket flash-lamps, and in other wayswhere it would be impossible to employ bat-teries containing liquids.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectelectri, bookyear1915
