BELTING FOR POWER TRANSMISSION. The trans mission of power from an engine or motor to a machine by the method of driving shaft and pulley demands the employment of belts or ropes of careful manufacture. These are variously of leather, friction surface rubber balata, solid woven cotton and other materials. Despite the advance of electrical power transmis sion, belt and rope drive is still largely employed, and the manu facture of power-belting is an industry of considerable dimensions. In addition to the selection of the best type of belt for a given type of power transmission from a manufacturing standpoint, other important considerations are belt fastenings, pulleys to be used, stresses and loading under maximum conditions. When the power to be transmitted is not large, round or V-shaped belts are used. Cases of this are seen in the cooling fan and generator of automobiles and transmission drives on motorcycles. Most of the applications in industry, however, are of the leather, rubber, cotton or steel types of flat belt.