. Electrical world. lves the separationof plates when they are removed from the jar and means morelabor and a greater breakage of separators and plates than at thefirst cleaning. When this has been done and the battery has goneinto service for ihe third time, it is good for about 60 days morework before all of the active material on the positive plates has beenshed and their useful life ended. When this point is reached a newset of positive plates is substituted and since this means the handling of fragile acid-soaked wood separators, these also must be replacedby new ones. The battery then st
. Electrical world. lves the separationof plates when they are removed from the jar and means morelabor and a greater breakage of separators and plates than at thefirst cleaning. When this has been done and the battery has goneinto service for ihe third time, it is good for about 60 days morework before all of the active material on the positive plates has beenshed and their useful life ended. When this point is reached a newset of positive plates is substituted and since this means the handling of fragile acid-soaked wood separators, these also must be replacedby new ones. The battery then starts out entirely fresh except forthe negative plates. In most cases these hold out and show nosigns of failure until the next cleaning and they do not appear togive out together as do the positives. An average might be set at^one set of negative plates for ^ sets of positive plates. Taking a full years work, the cost per annum for a batteryunder the above conditions is about as follows: New positive plates,. FIG. 2.—ELECTRIC EXPRESS W.\G0N. $155; new negative plates, $84; new wooden separators. $;rubber separators. $; rubber jars broken in service and handling,$; total repair in connection with battery, $65; supplies and allother expenses, $ Total, $ On the basis of 30 milesper day and 288 full working days per year for such a wagon, thismeans 8,640 miles per year, which brings the battery to cents per vehicle mile, or $ per day. As to rubber tires, on a 2,000-pound wagon, a 3^4-in. tire is a gen-erous one and the price of a set of such tires, allowing somethingfor scrap, is about $188. In New York City such tires may be de-
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
