76
A TREATISE ON GAS-LIGHT.
brought over
0
l
4
we procure Gibs. 4 oz. of tar which
we use as pith—it saves us - - -
0
1
0
0
2
4
Deduct for coal
0
1
0
Profit on coke and tar - -
0
1
0
The gas yielded by the 4 pecks of coalsin the pot, make 42 brilliant lights,which bum 7 hours. To keep 42tallow candles which were formerlyused in the manufactory burning forthe same time, required 7lbs. whichat Is. per lb. cost - -- -- 070
To this, add profits on coke and tar o l 0
Gained out of every bushel of coal -080
ee The gas-burners made use of in our ma-nufactory produce jets of flame, which in ourbusiness, where much soldering with the blow-pipe must be done, have a decided superiorityover Argand’s lamps. We are not nice con-cerning the quality of the gas—a great part ofit is burned from the gasometer, without allow-ing it to purify itself in the gasometer, becauseour gasometer is not large enough to storeup the whole quantity of gas we want for use.”