The Vaporizing Of Paraffin for High-Speed Motors
(Electric Ignition Type)

CHAPTER II. PETROL CARBURETTORS. The value of liquid mineral hydrocarbons and veget able carbohydrates has long been recognised for use in ex- plosion motors of small power, thanks to the ready adaptability of the more volatile products obtained in the process of distillation for paraffin or kerozene, such as used for burning oil. Indeed, the benzine series, benzoline, essence-de-petrole, gasoline, now better known as motor spirit, lends itself so readily for either supplying carburetted air or spray direct to the motor cylinder, that, in spite of the necessary precautions for storage and distribution, spirit motors had already become very widely aclopted for general purposes requiring a com- paratively small power. before the introduction of the automobile. The method of forming an explosive mixture at first consisted invariably of a specially con- structed carburetting chamber, through which the motor aspirated its air supply, and consequéntly operated on the evaporative principle. The air in an apparatus of this kind became super-saturated, and was mixed with a further supply of air before admission to the motor, the action of which in other respects was not dissimilar to the ordinary motor operating on illuminating gas; but as all such gasifiers, known as surface carburettors, depend for their action on absorption of spirit vapour