100 litres of acetylene will take up 40
grammes of petroleum spirit to yield 110 litres of carburetted acetylene
evidently containing 9 per cent. of vapour, or 100 litres of acetylene
may be made to absorb as much as 250 grammes of spirit yielding 200
litres of carburetted acetylene containing 50 per cent. of vapour; while
the petroleum spirit may be replaced, if prices are suitable, by benzol
or denatured alcohol.
The illuminating power of acetylene carburetted with petroleum spirit has
been examined by Caro, whose average figures, worked out in British
units, are:
ILLUMINATING POWER OF CARBURETTED ACETYLENE.
HALF-FOOT BURNERS.
_Self-luminous._ | _Incandescent_
1 litre = 1.00 candle. | 1 litre = 3.04 candles.
1 cubic foot = 28.4 candles. | 1 cubic foot = 86.2 candles.
1 candle = 1.00 litre. | 1 candle = 0.33 litre.
1 candle = 0.035 cubic foot. | 1 candle = 0.012 cubic foot.
Those results may be compared with those referring to air-gas, which
emits in incandescent burners from 3.0 to 12.4 candles per cubic foot
according to the amount of spirit added to the air and the temperature to
which the gas is exposed.
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