340 Silliman and Wurtz on Flame Temperatures. 
sur . 
a Se views have been rife, even among chemists, with 
Seed to the temperatures of luminiferous flames. Some have 
been satisfied with believing crude hypotheses; such as that the 
heat-power of a flame is always baton to the density od 
y applied Bunsen’s methods in practice. We con- 
aloe it quite time that these methods should be introduced 
to the knowledge of gas engineers, in forms available to 
em. 
Bunsen’s formulz for these computations are based upon n the 
a ental determinations of the total amounts of heat 
developed by the combustion of different t pure combustible 
pure oxygen, made by Favre and Silbermann; and 
tipon Pitnaie a eterminations of the specific heats of gaseous 
ucts of combustion. 
It is not to be maintained that Favre and Silbermann’s num- 
bers are strictly correct, but they are doubtless approximate, 
a at er proportionally correct among themselves. At any 
oe iy are the best data we have. ince! employed here are 
inclu in the ise table, They are y given in the 
; | calyage for m Saoal weighs of the gases, but we have redu 
an , care volumes also, as more re suitable to 
‘ae ction is made simply by mult- 
"thee uivalents Peg Aiemate by the densities as given 2 
