play 
Peper st: eee 
vena 
ton 
ee 
. 
B. Silliman on Wollongongite. 87 
Average yield of (5 charges) ae per ton, - < 7 16 cubic feet. 
Coke (very light and lustrous), - 0 Ibs. per ton. 
Illuminating power of 5 feet of gas burned 
in Scotch fish-tail burner 132°94 candles. 
One bushel of lime purifies, Be ges tbe 2 5686 cubic feet. 
Gas from one ton equals sperm, - -~— - 6251°26 lbs.* 
The gas obtained was so rich thatits illuminating power could 
be measured only by diluting it very largely with common street 
as of known power, Even when 10 per cent of the Wollon- 
gong cannel gas was added to 90 per cent of street gas, whose 
illuminating power was 14°98 candles, it was found still too 
rich to burn in the 15-hole standard Argand. But it could be 
burned, however, at the rate of five cubic feet in a Scotch tip 
fish-tail burner, giving from the mixture an illuminating power 
of 2654 candles. From these data, the candle power of one 
cubic foot of the gas of this material is equal to 26°59 candles 
—a degree of illuminating power unexampled, so far as we are 
informed, in the records of gas-making from any material 
heretofore examined. This appears more clearly on compar- 
: ns this result with some of the best-known of the cannels of 
nd and the United States, thus :— 
1 eubie foot 
=candles. 
Wollongong cannel =Ilbs. of sperm perton, 6251°26 26°54 
Boghead cannel = b: - 41967710 
“c “c — 6 3 {2755°6 10°38 
oe “ce = it ‘14 1 9 3 5. bg 5 29 
Albert coal, N.B2 = _ ay 3016°37 11°73 
Peytona cannel, an - “ ; 440 4 
Lesmahago cannel, = = _ 1529 8°77 
-Capeldra, = “3 x 1670 10°01 
Donibristie, = . si 1277°5 751 
Vigan, —_- * “ 627°4 3-04 
Pelton Main (caking),—= “ sd 532 12 
Ramsay’s(Newcastle),—= ne ed 553 33 
Westmoreland, Pa. = “ ee 541°25 3°32 
The heap htors density of the gas obtained in this process is 
surprising, inasmuch as 1816 pounds avoirdupois of gas gives 
for each cubic foot of gas 926°72 grains. Now as 536-96 grains 
* The standard candle mm use among gas engineers consumes 120 grains of 
rhour. The total economical value of begs gas coal is best obtained by 
multiplying the candle power of the gas produced from one ton of the coal into 
the volume of the gas: thus as the Wollengtmelie pier 13,716 cubic feet of gas, 
one foot of which has an illuminating power of 26-54 candles, therefore we have 
26: 54X sip Ai eR pa 26 pounds of sperm as the value of the S 
from one ton 
cacinbieiit of shah proprietors r. Fyfe. 
Ma hatin Co., loc. ¢ Our own Tomah: 
