i6 



McBAIN 



[1845 Pouillet 



1845. M. Pouillet. 



Note 6ur I'electrochimie. Comptes rendus, 2o, i sem., 1544. 



Apparatus : a U-tube ; capacity lO c.c. ; Pt electrodes ; no 

 diaphragms ; no middle portion ; a water voltameter. 



The author found no transport of gold in solutions of gold 

 chloride; for the chlorides of iron, manganese, and cobalt 

 n = .66 — ; for other chlorides 11 lay between .7 — and .8 — . 

 The author deduced that the action of the electrodes is unequal 

 owing to the positive and negative constituents of an electrolyte 

 having electric charges opposite in sign but unequal in amount. 



1853. w. Hittorf. 



Ueber die Wanderungen der Jonen wahrend der Elektroljse. Fogg. Ann., 8g, 

 177, Ostwald's Klassiker, 21. 



Apparatus : (i) a short wide glass cylinder of which the two 

 parts could be isolated by sliding the upper half sideways ; 

 capacity 44 c.c. ; the anode consisted of the metal corresponding 

 to the electrolyte ; the cathode was of Ag. No middle portion ; 

 no diaphragms. In the second column are given the number 

 of grams of water in which one gram of salt was dissolved. 



1856. W. Hittorf. 



Ueber die Wanderungen der Jonen wahrend der Elektroljse. Pogg. Ann., 

 g8, 1, Ostwald's Klassiker, 2/. 



Apparatus : (ii) Cathode cylinder fitted into neck of anode 

 cylinder; capacity about 80 c.c. ; Ag cathode ; no middle por- 

 tion ; no diaphragms, (iii) Horizontal cylinder divided by two 

 partitions of porous earthenware into three compartments, (iv) 

 Four superposed glasses, with diaphragm of intestinal mem- 

 brane (Darmhaut) ; the upper (cathode) vessel contained free 



