Preface XXVIl. 
carbon deposits, and a gill of denatured alcohol 
poured into each cylinder has proved effective 
in loosening the carbon so that it may be 
readily blown out through the exhaust. 
_ So speaks the New York trade paper ; going 
East I noticed The Indian Trade Journal 
told us in an article last January, in which it 
also discussed the question of liquid fuel, that 
‘Alcohol, although in many cases an excellent 
fuel, is not commercially practicable in those 
countries which impose a high excise duty 
upon it, as in Great Britain, whereby its 
price is rendered prohibitive. It is a vegetable 
product, obtained by the fermentation and 
distillation of grain, &c. It has a specific 
gravity of ‘820, is moderately volatile, and 
has a greater explosive range for variable 
proportions of gas and air than petrol and air, 
and can stand a much higher compression 
without self-ignition taking place. Methylated 
alcohol, or wood spirit, is the commercial 
article mostly used in preparation of varnishes, 
&c. French alcohol is purer and cheaper. 
Wood naphtha is also sold as distinct from 
mineral naphtha.” 
On June 12 the same paper (/udzan Trade 
JSournat) tells us India, as one of the largest 
producers of vegetable substances suitable for 
the manufacture of industrial alcohol, is keenly 
‘1 Coco-nut planters, instead of losing the milk, as well 
as those having manila and sisal fibre refuse, could also 
make alcohol, so should note these particulars. 
