APPLICATION OF THE GAS FROM COAI. ^7 



The quantity of aqueous fluid, that came over in the Aqueous fluid. 

 course of the observations which I am now giving an account 

 of, was not exactly ascertained, from some springs having 

 got into the reservoir ; and as it has not been yet applied to 

 any useful purpose, I may omit further notice of it in this 

 statement. 



The interest of the capital expended in the necessary ap- Interest of oa* 

 paratus and buildings, together with what is considered as^^**^* 

 an ample allowance for wear and tear, is stated by Mr. Lee 

 at about .£550 per annum: in which some allowance is 

 made for this apparatus being upon a scale adequate to the 

 supply of a still greater quantity of light, than he has occa- 

 sion to make use of. 



He is of opinion, that the cost of attendance upon candles Attendance 



would be as much, if not more, than upon the gas apnara- "°^ "^°lf ^'^^" 



. . . ^ * ^' on candles. 



tus; so that jn forming the comparison, nothing need be 



stated upon that score, on either side. 



The economical statement for one year then stands thus : 



Cost of 110 tons of cannel coal - .£125 Expense of th« 



Ditto of 40 tons of common ditto 20 S^s lights. 



145 



Deduct the value of 70 tons of coak 93 



The annual expenditure in coal, after de- 

 ducting the value of the coak, and without 

 allowing any thing for the tar, is therefore 52 

 .And the interest of capital, and wear and tear 



^f apparatus 550 



making the total expense of the gas apparatus, about ^600 

 per annum. 



That of candles, to give the same light, would be about That of can- 

 i€2000. For each candle consuming at the rate of 4 tenths ^^^'' 

 of an ounce of tallow per hour, the 2500 canJles, burning 

 upon an average of the year two hours per day, would, at 

 one shilling per pound, the present price, amount to nearly 

 the sum of money abovementioned. 



If the comparison were made upon an average of three The compari- 



hours per day, the advantage would be still more in favour ^°" ™°'^® ^^" 



r 1 - 1- 1 ^ ■ n 1 • ■, vourabletothe 



ot the gas light ; the mterest of the capital, and wear and gas where the 



Vol. XXI— Oct. 1808. H tear 



