. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . s a sufficient num-ber of cells to supply the full line volt-age at the end of the discharge. Whenfully charged the total voltage of thebattery is considerably in excess of theline voltage and fewer cells would suf-fice. During discharge, the voltage sup-plied to the line and the output areregulated by the so-called end cellswitch, which serves to connect morecells in the circuit in proportion as thevoltage of the individual cell switches are of either the auto-matic or the hand o
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . s a sufficient num-ber of cells to supply the full line volt-age at the end of the discharge. Whenfully charged the total voltage of thebattery is considerably in excess of theline voltage and fewer cells would suf-fice. During discharge, the voltage sup-plied to the line and the output areregulated by the so-called end cellswitch, which serves to connect morecells in the circuit in proportion as thevoltage of the individual cell switches are of either the auto-matic or the hand operated types. CARE. The effect of temperature on theefficiency, and the ampere hour capacityof the battery is very great. The tem-perature should never be allowed toexceed 100 degs. F. The temperature ofa group of cells should always bemeasured near the center of the the battery gives its full capacity at70 degs. F., at 30 degs. it will giveabout 75 per cent, of its capacity, andat 90 degs. 112 per cent. The propertemperature of a battery is from 60 to 70degs. F. Any attempt to operate a. POSITIVE PLATE. battery above its normal temperaturewill result in excessive wear of theplates. • The level of the electrolyte shouldbe maintained about one inch above thetop of the plates, and its speci ic grav-ity at full charge should be from as was stated before. Thespecific gravity of each cell should bedetermined at least once every upon testing the specific gravity of a cell it should be found to be less thanthat of the surrounding cells, it is gen-erally due to local action or short cir-cuit. The cause should be removed, andthe cell should be disconnected andseparately charged to bring it up to thecondition of its mates. Never add acidto bring up the specific gravity untilthe cause of lowness has been care-fully determined. Water should be added from time totime to maintain the proper level. Thiswater should be introduced into thetank at the bottom thro
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