Oh Saturation Specific Heats, fyc. 407 



between zero and 80 alternations a second than from 80 to 

 the frequency of light. 



Table III. 



liatio of the Initial Values of Dielectric Constants in 

 Steady Fields to those in Alternating Fields. 



K 80 - 



4-6 



8-5 



309 



272 



2-32 



4-43 



403 



308 



2-79 



454 



6-98 



2-8 



4-56 



K /K 



80- 



Quartz || 



Flint-Glass A 4-1 



Resin 



Canada Balsam 

 Paraffin-Wax . . 

 Gutta-percha .. 



Sulphur 



India-rubber 



Ebonite 



Quartz X 



Flint Glass A 3*3 



Amber 



Sealing- Wax 



13 



2-8 



25 



29 



7-0 



23 



19-5 



69 



5-6 



c. 24 



7-0 



1-58 



4-38 



1-07 



3-4 



G.M 



4-2 



1-5 



455 



10 



70 



10 



2-8 



10 



.4-6 



10 



XL. Saturation Specific Heats, 8fc, with ran der Waals' and 

 Claudus* Characteristics. By Robert E. Baynes, M.A. 



[Plate VI.} 



OVER twenty years ago, and shortly after reading- 

 Planck's J SSI Memoir " Die Theorie des Sattignngs- 

 gesetzes" in vol. xiii. of Wiedemann's Annalen, I calculated 

 in the following manner the values for different temperatures 

 of the latent heat of vaporization and of the saturation 

 specific heats on the assumption of van der Waals' equation, 

 as also the values of other magnitudes. I did not publish 

 my results as the equation does not represent actuality ; but 

 such of them as have not since been published by others I 

 desire now to record, since they contrast very greatly with 

 the results of similar calculations which I have lately made 

 on the assumption of Clausius' characteristic. 



* Communicated by the Physical Society : read January 21, 1910. 



