. An elementary book on electricity and magnetism and their applications. batteryof from 40 to 44 lead cells or a 60-cell Edison battery. As inother automobiles the power may be transmitted from themotor to the wheels either by chains or by shaft and battery compartment is usually hung beneath the chassisframe, as shown in figure 365, although some makers place the ELECTRIC TRACTION 513 battery beneath the drivers seat. Improvements in the designand operation of electric vehicles in recent years have been so nu-merous that where electricity can be bought at 3 cents per kilo-watt hour
. An elementary book on electricity and magnetism and their applications. batteryof from 40 to 44 lead cells or a 60-cell Edison battery. As inother automobiles the power may be transmitted from themotor to the wheels either by chains or by shaft and battery compartment is usually hung beneath the chassisframe, as shown in figure 365, although some makers place the ELECTRIC TRACTION 513 battery beneath the drivers seat. Improvements in the designand operation of electric vehicles in recent years have been so nu-merous that where electricity can be bought at 3 cents per kilo-watt hour for charging the storage batteries the cost of energyfor a five-ton truck constitutes less than 10 per cent of the entireoperating expense. The comparative costs of maintenance ofelectric and gasolene vehicles show the greater economy of theelectric vehicle due to the smaller number of wearing parts andthe lower operating speed of the machine itself. 351. Electric boats. Before leaving the subject of vehiclespropelled by electric motors, we must just touch on the sub-. Propell Air Tanks Battery Balancing Tarda Fig. 366. — Section through a submarine with large storage battery in thecenter of the boat. ject of boats propelled by electric motors. Electric launchesare very much like small steam or gasolene launches, but in-stead of the hot steam boiler and engine or the disagreeablegasolene engine we have an electric motor, which may be putout of sight under the floor and operated by an electric currentfrom a storage battery, the cells of which are placed under theseats and floor to act as ballast. The boat is not so independentas a steam or gasolene launch, for the battery must be chargedevery day to keep it in good order for operating. Electriclaunches are, however, convenient for use wherever currentcan be obtained for charging the batteries. In recent years we have all been reading a good deal aboutsubmarines (Fig. 366), but we may have forgotten that these2l 514 ELECTRICIT
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmagnetism, bookyear19
