226 Dr. John Gorrie on the 
signing 1° F. as the quantity of heat evolved from air, under a 
reduction of ;1, of a volume, no matter of what density. The 
preceding tables of experiments, however inexact they may be, 
are sufficiently extended and precise to prove that all the above 
formule are erroneous. 
~ But so probable, at the outset of my experiments, did it appear 
that the relation between the condensation of air and the disen- 
gagement of heat, followed some law of arithmetical or geomet- 
- neal proportion; and so firmly was the probability impressed on 
© my mind, that observations of a different tendency produced only 
doubts of their accuracy. The quantity of heat obtained by re- 
_ ducing air from its atmospheric state to half its volume, I as- 
~ sumed as the basis of a calculation for every subsequent similar 
_réduction, until frequent repetition of the experiment taught me 
be 
‘ t, >) sae error and the necessity of a different conclusion. 
» An inspection of columns 6, 7, 10, 11, of Table V, will 
wy _. prove that all previous estimates of the heat set free by a 
=? change.in the density of air, as well as all supposed natural laws 
ents, as reco 
he ex 
pee eee . 
re res, 
loyed idications 
, ald th 
of the thermometer, The 
| v_of pro- 
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ture’of. an a 
7 degrees -* - 
Be and whet ‘ 
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