Wave-trains through Layers of Electrolyte. 

 Table II. 



539 





X cms. 



n. 



h. 



Water 



108 

 106 

 104 

 174 



154 



8-33 

 8-49 

 8-(>5 

 517 



5-84 



69 5 

 72-0 

 749 

 26-7 



34-1 



(1) ZnS0 4 solution 



(2) ZuS0 4 solution 



95 per cent, alcohol 



3 vols, alcohol "1 



1 vol. water J ' 



Air 



900 



- 



— 





solution only slightly increases its dielectric constant, thus 

 confirming entirely the similar result published in 1892 by 

 Cohn* (to whom we are also indebted for the first determina- 

 tion of the high constant of water f). 



For comparison with my figures I give in Table III. the 

 dielectric constants of water and alcohol found by other 

 investigators. 



Table III. 



Method used. 



Authority. 



Dielectric Constants. 



Water. 



Alcohol. 



Alternated or 

 interrupted \ 

 currents. 



Heerwagen L . 

 Eosa 2 . 

 Eosa 3 . 

 Bouty 4 . 



79-56 

 7570 

 70 



257 



30-9t 

 7-93 



Euhmkorff coil j 



Tereschin 5 . 

 Cohn & Arons 6 . 



83-8 

 76 



27* 

 26-5* 



Hertzian oscil- | 

 lations. 



Ellinger 7 . 

 Cohn 8 . 

 Stschegtiaeff 9 . 



81 

 73-5 

 1-75 



24 

 1-62 



98 per cent. 



t 93 per cent. 

 Phil. Mag. xxxi. p. 200 (1891). 



Wied. Ann. xlviii. p. 35 (1893). 



Ibid, xxxiv. p. 344 (1892). 



Jour, de Phys. 3 e sene, tome i. p. 445 (1892). 



Wied. Ann. xxxvi. p. 792 (1889). 6 Ibid, xxxiii. p. 13 (1888). 



Ibid. xlvi. p. 513 (1892). 8 Ibid. xlv. p. 370 (1892). 



Phil. Mag. xxxiv. p. 388 (1892), or Journ. de Phys. June 1892. 



* Wied. Ann. xlv. p. 370 (1892). 



t Cohn & Arons, ibid, xxxiii. p. 13 (1888). 



