378 Prof. Partington and Mr. Cant on the Specific Heats 



Table IV. 



Number of 

 Experiment. 



X/2 S0 2 cm. 



X/2 air cm. 



k\ 



1 



5-152 

 5-142 

 5-156 



8-117 

 8-099 

 8-125 



1-249 

 1-250 



1-248 



2 



3 









Mean 



... 1-249 



p c for S0 2 = 78-9 atm. ; T c = 428°-4 abs. ; 

 d 2 /d 1 = 64*06/28-98 . (0,-0,) = 2*128 ; = 1-0332. 

 Therefore 



K = Gp /c v = 1-290 ; C p = 9-47 ( g. cal.; 

 C„=7-34 g. cal. : all at 13°*2 0. at 1 atm. 



Thibaut (Ann. Phys. xxxv. p. 347, 1911), using Behn and 

 Greiger's method, found at 20° and 1 atm. c p /c v =l'25S. .He 

 used the experimental values for the densities of air and 

 sulphur dioxide in (7) without further correction. 



IScholer (loc. cit.) gives under the same conditions 1*237 

 uncorrected and 1*265 corrected, calculated in the way 

 described. 



Schweikert at 0° and 1 atm. gives 1-2664 corrected. 



The values have been re-calculated as described above, and 

 are oiven in the followino- table. 









Table V. 











Sulphur dioxide. 1 atm. 



Author. 



t°G. 



X/2 S0 2 | X/2 air 

 in cm. in cm. 



k'. 



#.- 



K = 

 Cp/C v 



corr. 



C p-~ C v 



g. cal. 



0, 



g. cal. 



g. cal. 



Thibaut ... 



20 



5-190 8-250 



1-228 



10308 



1-266 



2-118 



10-08 



7-96 



Scholer ... 



20 



5-999 



9511 



1-233 



1-0308 



1-271 



2-118 



9-93 



7-82 



Schweikert. 







u SO,= 



209-4V 



u air = 

 331-9 m. 



1-234 



1:0385 



1-282 



2-149 



9-77 



762 



Cant and 

 Partington. 



132 



per sec. 

 5-150 



per sec. 

 8-114 



1-249 



1-0332 



1-290 



2-128 



9-47 



7-34 



