xxvii. The Fermentation of Cacao 
interested in the continuous rise in the price of 
petroleum spirits and in every fact that points 
to the alternate substitution of alcohol as a 
source of power. We therefore quote in full 
an article from the Manchester Guardian which 
furnishes a number of useful data :— 
“There are many practical difficulties in 
the way of producing a sufficient supply of 
benzol under conditions which would allow 
any attempt at price cutting on the part of the 
suppliers of other motor fuels to be disregarded. 
Alcohol is the only fuel which can be obtained 
in virtually unlimited amount without encroach- 
ing on capital, so to speak, as we have to do 
with other fuels. It is obtainable from virtu- 
ally everything in the vegetable world; not 
only from roots, as beets and potatoes, and 
from grains, but from such things as peat and 
even sawdusts. There should be no difficulty, 
therefore, in securing an adequate supply at a 
low price. The sources from which it can be 
obtained are so numerous and their interests so 
competitive, that there would be no possibility 
of an alcohol ring being formed to force up the 
price of the fuel. 
‘As regards denaturizing, when alcohol is 
mixed with 25 per cent. its bulk of benzol, the 
alcohol being of a specific gravity of 0°833, an 
engine can be started up from cold and run 
with an ordinary carburettor.. Benzol is often 
employed as a denaturizing substance, especially 
in Germany. It is stated that it is impossible 
