Radiator

—1. In wirele telegraphy, the aerial wire used for transmitting me ages, 2. In automobiles, a tubular or honeycomb device for the purpose of cooling the water that prevents the motor from reaching too high a temperature. Radiators are of quite varied design, the object in each case being to expose as large a surface as po ible to the air. The water is carried in a tank slung near the rear or driving axle, is forced by means of a small centrifugal pump through the water jackets, pa es to the radiator, and returns to the supply tank once more. Fans or propellers, belt driven from the crank shaft, are frequently employed to a ist the radiator, drawing air through it from forward, and discharging over the outside cylinder casing, thus keeping down the temperature inside the bonnet.