Show I ADVENT Of THE AUTO Was Made Possible By Development of Extremely Light Gas Engines I 1 The advent of the automobile was made mad possible only by the development of gas engines of extreme lightness An mobile engine usually weighs some 16 15 to toIS tois IS pounds pe per A L A M 11 or con conservatively conservatively rated horsepower as com compared compared pared with about 33 pounds per horse harse horsepower power In the old stationary types Of gas engines The trend of present day automobile auto automobile mobile engIne design Is toward the long stroke and toward quietness and higher efficiency The modern modem long stroke tendency started start started ed largely on account of the wonderful speeds attained by cars with long stroke motors In the European 4 races The principal reason for this new devel is to secure longer lived motors since the longer stroke the slower thIS the motor can run and still deliver Its full power During the past five years ears the automo bl bile e has undergone great development and at an unprecedented speed a phase which every new mechanIc Is obliged to pass through It has been Improved to in quality and cheapened b the natural method of elimination of the more unfit constructions This process Is still gon going on but at a slower pace than for merl merly The motor has been quieted by atten tion to the mechanism to the and to the exhaust line It has been given remarkable by Improvements principally In the car and valve setting and the mag neto has come Into Its own as the most reliable source ot of Ignition current The radiators have been strengthened and Increased In cooling effIciency The cylinder jacketing and lubrication have hav been cared for tor In a way that there Is no longer any excuse for tor an over heated motor |