344 Silliman and Wurtz on Flame Temperatures. 
oxygen. The number for the 2 get heat of nitrogen is the 
same as before; and the equation is no 
33642° ey pass 
*= @2X02163) Nabi ee C. = 5425° F. 
not only the latent heat of steam entering as a subtrahend 
into the numerator; but also into the denominator, as divisors, 
ca aa of the specific heats of steam, carbonic acid, and nitro- 
» heh; as 8 lbs. of marsh gas consume 22 Ibs. of oxygen, and 
produce 22 lbs. of carbonic acid, and 18 Ibs. steam; and as 
14 Ibs. of olefiant gas consume 48 Ibs. of ox gen, producing 
44 lbs. of carbonic acid, and 18 lbs. of steam, the equations for 
the ee oT of their flames in air become— 
For mar 
sl A °C.=4386° F. 
ie (18°X Bieces X 2163) +(32°K3°318x: ais 4 Fe 
And for olefiant gas : 
66012°—(18x 537°) =9743° C4970" F. 
~ (8x iia) tak X 2163); (48° 3-318 -2438) —=2748"C. : 
When the deduction for the latent heat of the steam of com- 
bustion is not made, the results in these two gases are consider- 
ably ae, as will be obvious from mere inspection of the 
We shall now give, in tabular form, all the results of our 
calculations of the calorific ¢ powers when burning in the air, of 
the four gases we have to deal with. 
TABLE IL 
For equal volumes of the _Calorific effects in heat- Calorific effects, above 
gases burning in air. ing liquid water. 100° C. 
Centigrade Fahrenheit Centigrade § Fahrenheit 
= (sp. heat HO=-4805) 3192° 5778° 27449) =. 4971" 
Hydrogen } (sp. heat HO=4750) 3204° 5799° 2755°} = -4591° 
NR as oe eget 5788° | 5749° 4980" 
don ate Se 2996° 5425° 2996° bone 
Marsh gas, (sp. heat n0= 4805. asso 4820° 2414 7 
Olefant gas, : ‘ 2916° 5481° 2743° 497u° 
utation of calorific effects of mixed gases.—The above 
S$ simple the calculation of the —— ich - 
mixture, w centesim wie eet 
y to obtain the sum of the multiples 
SEIS a eigen Nate a Si ei a yo A 
