Mode of reasoning in Chemistry. 358 
tind textures, but still in degrees which can com- 
pared with one another ; that it passes through the substances 
of different bodies, with various degrees of facility and speed; 
these are so many general facts, which are learmed by experi- 
ment, but which no one need attempt to account for. They 
‘are severally the modes in which heat operates, and are there- 
fore properly called the laws of heat, and become so many 
enabled us to explain very many phenomena of nature ; and 
probably no facts were ever more useful than these, in their 
practical applications to the arts. The conversion of sensi- 
dle into latent heat, during the liquefaction and vaporization 
of bodies, and its re-appearance in sensible form, in the 
i of lation and condensation, itute 
another class of general facts, ascertained by experiment, which 
like those before mentioned, are exceedingly important in the 
fford of the phenomena both of nature and 
of these, indeed, as the cold produced by 
q . hl 
planation of freezing mixtures, falls short — rt Ase 
a body passes from the solid to the fluid state, a portion 
heat disappears, and the temperature is reduced; and the 
VOL. XI.—wNoO. 2. 45 
