312 



llEPOKT — 187(). 



As my expel imeiits with nitrous oxide presented anomalies which did not 

 occur with carbonic acid, I first made some experiments with the latter gas, 

 in order to try whether they were to be ascribed to observational errors or to 

 the nitrous oxide I used. The results are given in the following Tables, 

 where S is the fraction representing the ratio of the volume of the air after 

 and before compression to one another at the temperature i, e the correspond- 

 ing fraction for the carbonic acid at the temperature t'. and I the number of 

 volumes which 17,000 volumes of carbonic acid, measured at 0° and 760 

 millims., would occupy at the temperature and pressure of the observation. 

 The number 17,000 has been taken as unit to compare thef5e Tables with 

 those of Andrews. 



Table I.— Carbonic Acid at 21°-45 C. 



_JL- 



67-S-' 



Tl-SO 

 1 



I '^' 



■20 



1 



78-!(6 



81-40 



Table II.— Carbonic Acid at 31°- 15 C. 



6y-i3 

 1 



TO-eu" ; 



1 i 



72-03 I 



1__ i 

 "73-36 ' 



1 



lO-OO 

 10-00 

 10-49 

 10-97 

 10-.30 

 10-52 

 10-65 

 10-30 

 10-30 



1 



124-^36 



1 



i32-7t> 



UO-21 



1^_ 



lof>-76 



1_ 



lesTi 



31-12 

 31-19 

 31-13 

 31-U 

 31-18 



152-4 

 142-8 

 135-2 

 121-7 

 112-8 



