. Practical wireless telegraphy; a complete text book for students of radio communication . ressed, perforated, corrugated steel pockets which have been filled andpacked with iron oxide, to which has been added a small amount of metallic mercury. The positive plate consists of a nickel-steel grid to which are secured perforated steeltubes reinforced by seamless steel springs. These tubes are filled with alternate layers ofnickel hydrate and very thin plate nickel firmly and carefully packed by a loading machine. 82. The Charge and Discharge of the Edison Cell.—The process takingplace in an Edi
. Practical wireless telegraphy; a complete text book for students of radio communication . ressed, perforated, corrugated steel pockets which have been filled andpacked with iron oxide, to which has been added a small amount of metallic mercury. The positive plate consists of a nickel-steel grid to which are secured perforated steeltubes reinforced by seamless steel springs. These tubes are filled with alternate layers ofnickel hydrate and very thin plate nickel firmly and carefully packed by a loading machine. 82. The Charge and Discharge of the Edison Cell.—The process takingplace in an Edison cell during charge and discharge is as follows: The first charging of an Edison cell reduces the iron oxide to a metallic iron, whileconverting the nickel hydrate to a very high oxide, black in color. On discharge, themetallic iron goes back to iron oxide and the high nickel oxide goes to a lower oxide, butnot to its original form of green hydrate. On every cycle thereafter the negative chargesto metallic iron and discharges to iron oxide while the positive plate charges to a high. Fig. 87a.—Group of Electric Storage Battery PortableChloride Storage Cells. nickel oxide. Current passing in the direction of charge or discharge, decomposes thepotassium hydrate of the electrolyte and the oxidation and reduction of the electrode arebrought about by the action of its elements. An amount of potassium hydrate equal tothat decomposed is always reformed at one of the electrodes by a secondary chemicalreaction, in consequence there is none of it lost and its density remains constant. _ The final result of charging is, therefore, the transference of oxygen from the iron tothe nickel electrodes and that of discharging is the transference back again. A hydrometer reading of this cell is not required as the specific gravity of the elec-trolyte does not change with the state of charge or discharge and consequent y :he onlydirect method to measure the state of charge is with an amp
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttelegra, bookyear1917
