380 ' Profs. Fleming and Dewar. Dielectric Constants 



-200" -150° -I00 c . -50 1 O- 



FiG. 3. — Curves showing the variation in Dielectric Constant with Temperature of 



various Oxides. 



" Further Observations on the Dielectric Constants of Frozen 

 Electrolytes at and above the Temperature of Liquid Air." 

 By J. A. Fleming, M.A., D.Sc., F.R.S., Professor of Elec- 

 trical Engineering in University College, London, and 

 James Dewar, M.A., LL.D., F.R.S., Fullerian Professor of 

 Chemistry in the Royal Institution. Received June 29, 1897. 



In continuation of our examination of the dielectric constants of 

 frozen electrolytes at very low temperatures, we have subjected to 



