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SPECIFIC HEAT OF GASES. 
III. 
I 
A Memoir on the Spetific Heat of the Gases- By Messrs. F. 
Delaroche and Bekard. To u'hich the Piize' proposed by 
the class oj Mathematics and Natural Philosophy of the 
Institute of France, in the year 1811, has been awarded. 
Abstracted by the Authors. 
(Concluded from p. 142.J 
Section II. 
Determination of thespeiific Meat of Gas, that (f the Air being 
taken for unity. , 
Apparatus 
aiiil Lxpeii- 
niuils 10 tlo- 
ttriimiK UiC 
spociJic iieat 
01 tiic (jases 
T he process we followed in the experiments we have 
been induced to make on the various gases, being the 
same for all, and having been suflicientlj’ explained in the pre- 
ceding section, we shall content ourselves in presenting the 
results together in a table. With a view to tender them 
more easily compared, vve have made som^e corrections, of 
whic'i it is necessary to speak: 
At first we conjectured, that in the limits of the tempera- 
ture in which the experiments had been made, the specific 
heat of the gases did not vary; but that small difference in 
the temperature had great influence on the measure of the 
gas, and in order to be able to compare the results better, we 
have supposed, in the fourth column, that all had been mea- 
sured at O’: 
To b>ing the results obtained with the different gases, 
to the same pressure, it w’as necessary to kriow, at least as nearly 
as possible, the influence of pressure on the specific heat of 
the gases. For wbicl. reason we shall explain, in one of the 
following sections, the manner in which we have obtained, by 
call Illation, the numbers which compose the eleventh column. 
The last column of the table, poir.fing out the excess of the 
stationary temperature at which each cunent would have kept 
the calorimeter above that of the ambient air, all circum- 
stances 
