532 Mr. J. P. Dalton on the Variation of Specific 



T. 100 c 



>c. 



T. 193°- 



8 0. 



Y. 



Go. 



v. 



Cr. 



71-22 



•1713 



1242 



•3254 



61-67 



•2217 



10-75 



•3320 



5597 



•1938 



9-76 



•3470 



52-2 



•1915 



8-45 



•3684 



50-35 



•1910 



7-81 



•3703 







716 



•3725 



T. 150 c 



c. 



6-52 



•3822 







5-88 



•4080 



65 61 



•2005 



492 



•4610 



56-81 



•2044 



4-60 



•4434 



51-56 



•2104 



3-80 



•4836 



44-67 



•2217 



3-51 



•5042 



41-26 



'2212 



322 



•5499 



37 84 



•2234 



2-93 



•6328 



34-46 



•2136 



2-86 



•6477 



3107 



•2063 



2-79 



•6001 



27-68 



•1974 



2-71 



•4967 



24-29 



•1991 



2-64 



•4576 



1947 



•2000 



2-58 



•4702 



T. 185 c 



>a 



T. 200° C. 



1206 



•2920 



9-76 



•3989 



10-44 



•3032 



8-45 



•4179 



948 



•3476 



7-81 



•4148 



8-21 



■3486 



6-52 



•4439 



6-96 



•3625 



5-88 



•4326 



6-33 



•3857 



5-24 



•4546 



2-42 



•3500 



2-80 



•3500 (?) 



2-38 



•3827 



2-63 



•3189 (?) 



2-33 



•3381 



2-52 



•2856 (?) 



2 26 



•3042 







If the gas laws were obeyed C p — C„ for ether would bo 

 0*0268 cal. E. Wiedemann* gives for ether 7oo = 1*078, 

 hence C v=a0 should be 0'3436 cal. This seems to be in- 

 compatible with the above results ; there is probably 

 some constant error in the experimental data used for cal- 

 culating <y which, however, does not influence their relative 

 value. 



For ether the following deductions may be made : — 



(1) In the liquid state C v varies with the volume more 

 than with the temperature, of which it is practically 

 independent. 



(2) In the gaseous state and at large volumes C^ is inde- 

 pendent of the volume, and becomes a function of the 

 temperature only. This conclusion is supported by Young's 



* E. Wiedemann, Wied. Ann. Bd. ii. pp. 195-217 (1877). 



