riiopEiiTiES or oii.-GAS. 427 



" Argand burner, oil-gas per hour, Of cZ. 



Argand lamps, spermaceti oil, 3 



Mould candles, 3^ 



Wax candles, 14"* 



When a quantity of light smaller than that g-iven 

 out by ten candles is only vvantcd, the cost mil be 

 proportionally less ; and as the gas improves by 

 keeping, whatever remains over from day to day 

 will be an advantage to the consumer. 



Besides, the above estimation of the cost of oil- 

 gas " is taken on the usual price of good whale-oil ;" 

 whereas, oil of the most inferior kinds, such as 

 brown oil, bilge or black oil, and even the greasy 

 substance called footje or footing, are applicable to 

 the manufacture of gas, in the use of which the cost 

 may be reduced to less than one-half. 



The first application of oil to the formation of gas, 

 has been attributed to Messrs John and Philip 

 Taylor, who, " about two years since," (that is, two 

 years prior to the month of July 1819,) conceived 

 " that it might be practicable to construct an appa- 

 ratus capable of converting oil into gas, which would 

 be preferable to coal-gas for lighting houses f ." In 

 their attempts for accomplishing this important de- 

 sign, they have been highly successful ; so success- 

 ful, indeed, that it is apprehended that when the 



• Quarterly Journal, vol- vii. p. 315. 

 + Idem for July 1819, p. 313. 



!itt fc.jw#. - 



