72 TkESIDI-xXTIAL ADDRF^SS — SECTION A. 



stitute, many thousands of miles having been run witliout any 

 evidence of corrosion. 



There are many other pet ml substitutes, the majority con- 

 taining a fairly large percentage of benzol. The Germans are 

 reported to be using a mixture consisting of 80 per cent, alcohol. 

 20 per cent, benzol, with the addition of 200 gms. of napthalene 

 per gallon. Among other sub'^titutes there are : — 



Benzol-Spirit : (a) 95 per cent, methylated •^])irit. 70 jiarts ; 

 benzol. 30 parts. 



(70 00 per cent., or ordinary methylated spirit 50 parts; 

 commercial acetone, 20 parts; benzol, 30 parts. 



Petrol-Spirit \ (a) 95 per cent. uietJiylated spirit. 70 parts; 

 petroleum spirit, 30 parts. 



(h) 90 per cent, methylated spirit, 50 jiarts ; commercial 

 acetone, 20 parts ; petroleum spirit, 30 parts. 



Acetone-Spirit : (a) 9s per cent, methylated spirit, 70 parts; 

 commercial acetone, 30 part=. 



(b) 90 per cent, methylated spirit, 50 parts ; commercial 

 acetone, 50 parts. 



Spirit-Ether: (a) 95 per cent, methylated spirit, 90 ]iarts ; 

 sulphuric ether, 10 parts. 



*'^'^ 95 P^'" cent. meth}-latcd spirit, 90 parts; sulphuric 

 ether, 10 parts; napthalene, i part. 



T understand that the motor fuel, known as '' Natalite," has 

 a composition similar to the fuel tested, but contains 40 per 

 cent, of sulphuric ether. I^his should give a very volatile fuel, 

 increasing the facility of starting, but the cost nuist be consider- 

 ably added to seeing that it requires about 1.6 gallon of alcohol 

 to produce t gallon of ether. 



To ni\- mind there is o!d\- one consideration which can 

 weiph as regards the general adoption of alcohol as a motor fuel, 

 and that is the cost of manufacture. This is a question which 

 should l)e investigated by the Industry and Research Committee 

 just formed. The main supplies of industrial alcohol have in 

 the past been derived from the potato and the beetroot. But 

 enormous cmantities are made from maize and from molasses. 

 ATr. Burtt-Davy informs me that he knows of one town in 

 .America where there are 18 distilleries making industrial alcohol 

 from maize. Maize is said to jiroduce c)o gallons of 94 per cent, 

 alcohol j^er ton of 2,000 lbs., and the corresponding yield from 

 molasses is said to be 80 gallons. The vield of molasses is 

 stated to be about ] a the vield of sugar, and to amount to about 

 40,000 tons per anninn in Natal. And the American tests 

 proved that mu-e alcf^hol is nof necessary for a motor fuel ; it 

 was found that with alcoh(-)l fn)m 84 ixm- cent, to 94 per cent, 

 purity, the con'^umption nf jmre rdcohol was about the sanie, 



