ADVANTAGES OF GAS. 55 



Upon a well-regulated system the cost of producing every 1000 cubic feet of 

 gas with the same coal will not vary one penny the whole year round ; the 

 quantity of gas made will be adequate to the demand, and no more. The 

 wear and tear of the machinery will be exactly that which was anticipated, 

 and therefore the annual outlay will be known ; the sale of the products of 

 the establishment may be depended upon with equal certainty, and the income 

 known : the profit arising from the difference is thus ascertained. I will give 

 as an example the results of a small gas establishment erected in the country. 



s. d. 

 Apparatus for the supply of 70 public and 75 



private lamps cost 500 



Retort-house and chimney 130 



400 yards of 4-inch pipe 101 13 4 



740 Do. 3-inch do. 129 



266 Do. do. - - - 39 13 



900 6 4 



OUTLAY IN 1838. 



Coal carbonized - 204 17 11 



Do. as fuel 54 15 



240 bushels of lime 600 



One man by day and one by night 62 8 



Lamplighter 31 00 



Repairs in the streets - 15 

 Repairs in the works, including wear and tear 



of retorts, meter and clock - 60 



Rent of ground - 20 



Taxes 20 



Office expenses - - 10 



484 11 



INCOME IN 1838. 



*. d. 



72 Private lamps at 3 = 216 



64 Public do. at - 4 = 256 



200 Gallons of tar at - 001= 16 8 



Coke, 247 chaldrons, at - 16 = 197 12 



670 8 8 



