xxvi. The Fermentation of Cacao 



the engine on such a comparatively heavy fuel 

 and of overcoming- the effects of the excess of 

 carbon. After several years of steady applica- 

 tion a practical kerosene carburettor is said to 

 have been evolved, in which 70 per cent, kero- 

 sene to 30 per cent, gasolene is used, the fuels 

 being mixed in the same tank and readily 

 vaporising upon entering the combustion 

 chamber of the motor. Another method 

 which is said to have found approval is the 

 use of a vaporizer to heat kerosene to a point 

 where it volatilizes and then mixing the vapour 

 with air. 



At the same time the advocates of denatured 

 alcohol are exploiting its advantages as a 

 motor fuel with new zeal, as the market is 

 believed to be nearing a level to bring it 

 into more practical competition with the 

 petroleum product. While alcohol meets the 

 general fuel requirements, it cannot be adapted 

 to the prevailing type of motors, but with 

 motors designed especially for its use, greater 

 efficiency and almost 30 per cent, increased 

 power are claimed for alcohol over gasoline. 

 On a sufficiently extensive scale, fuel alcohol 

 may be produced about one-third cheaper than 

 gasoline on its present basis, but-this realization 

 presupposes its adaptability to the automobile 

 engine. Its service in this field has already 

 been established as an inexpensive carbon 

 remover ; the larger use of lower grade gasoline 

 has magnified engine troubles by increased 



