RS aoe ee Mey gee? 
: tt? 
? 
<< Quantity of Heat evolved from Atmospheric Air. Al 
__ ments'on this subject, have been in — of using very small 
ame and fortune, but they save much labor by forming a con- 
stant for any number of calculations, or any modification of ex- 
periments. In regard to air, the change in its sensible tempera- 
ture, under an increase of density, is known to be great from the 
fact that by its sudden compression we may inflame tinder, and 
many other substances immersed in it. This trivial experi- 
ment, although in itself too indeterminate to found a valuable 
conclusion upon, has formed the basis of many chemical re- 
Searches, having for their object the solution of the question 
lew. 
Inv 
i 
Stconp Seis, Vol. X, No. 28.—July, 1850. 
