68 K. D. Rraevitch on an Approximate Law of the 



According to Regnault it is 76*43. A certain disagree- 

 ment proceeds from the fact that a considerable error might 

 enter into the calculation of the amount of heat required to 

 raise the temperature of the liquid from 0° to 85°, because 

 Regnault's observations did not exceed 39°*5. 



2nd Method. 



t. 



p. 



dp 



dt' 



t. 



P- 



dp 

 dt' 



60 



1164-51 

 1347-52 

 1552-09 



1779-88 



43-182 



47-989 



i 



8°0 



85 



2032-53 

 2311-70 

 2619-08 



53-127 



i 



65 



70 



75 



90 





C — C-, 



70° 





75° 





80° 



86173 



0-211* 

 0-0422 



85-926 



0-214 

 0-0428 



85-712 



The mean value of c— c± 0*0425 and the value of r 85*926 

 do not differ from those found by the 1st method, 0*04265 

 and 85*901. 



t. 



Pressures. 



t. 



Pressures. 



Calcu- 

 lated. 



Ob- 

 served. 



Calcu- 

 lated 

 from 

 equation 



Calcu- 

 lated. 



Ob- 

 served. 



Calcu- 

 lated 

 from 

 equation 

 (5'). 



o 

 -20 



... 



20 



40... 



60 



47-96 



128-46 



298-31 



617-73 



1164-7 



47-30 

 127-91 



298-03 

 617-53 

 1164-5 



47-99 

 297-38 

 1164-6 



o 



90 



110 

 130..., 

 150 , 



2618-5 

 4162-7 

 6296-8 

 9121-8 



2619-1 

 4164-1 

 6291-6 

 9095-9 



26189 



6306-5 

 9153-6 



* See Notes at end. 



