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

1NTRODUCTORY REMARKS. 3 existing there in the price of the two fuels was as Ild. to 16d. per imperial gallon, and as the daily consumption amounted to 17,000 gallons or more, when allowing for 1000 buses in active service, means a daily economy in the fuel account of close on £320. The practice, how- ever, of using benzole for power purposes had not caught on to a very considerable extent in Great Britain before the war, although then obtainable at a little over Is. per gallon at most of the gas works; the reason for this may be partly explainable by reason of this fuel having a slightly corrosive action on the tanks and connections when not carefully purified, and in part, no doubt, owing to the specific gravity often found to fail below that obtaining in ordinary commercial benzole, which sliould consist of 90 per cent, benzole plus 10 per cent, toluol; however, both of these products are now in demand for explosives; but there is a further reason, and that is that motor spirit is so easily procurable almost anywhere, that the ordinary user sets convenience against the lower price, notwithstanding that to run on benzole no im- portant structural modification is necessary either in the carburettor or in the degree of compression. Alcohol, it is true, might under favourable conditions be considered a more promising substitute as a motor spirit, either used alone, or mixed with benzole, which latter fuel when of equal proportions is found to work well in the ordinary petrol motor; but, as yet, little is definitely known as to the minimum cost of its production on a large scale. The only other alternative liquid fuel suitable for high- speed internal combustion engines of the electric ignition type is paraffin, or blends of this with petrol. Fortun- ately, there is as yet little or no sign of any material