6o McBAIN [1903 Goldberger 



1903. Goldberger. 



(Qiioted by W. A. Roth Zeit. phjs. Chem., 42, 210, from unpublished 

 experiments. ) 



BaCl,. In the following table the volume percent of ethyl 

 alcohol is given at the head of the column, the concentration of 

 the barium chloride in the first column. 



1903. Hornbostel. 



(Qiioted by W. A. Roth, Zeit. phys. Chem. 42^ 210, from unpublished 

 experiments. ) 

 KCl o.o34-o.oo84m 18° i2ex —.494 rh 4 in 10 volume percent alcohol. 



0.034-0.01 1 18° 9 — .481 rt= 5 " 25 " " " 



1903. R. Kremann. 



Ueberfiihrungsversuche zur Entscheidung der Konstitution von Salzen. 

 Zeit. anorg. Chem., jj, 87 (see also polemic, ibid., jj, 48). 



The formulas of Werner for purpureo-cobalt-chloride (ClCo- 

 (NH3),).Cl2 was confirmed by the movement of the colored so- 

 lution (rendered heavier by cane sugar) toward the cathode 

 when electrolyzed in a U-tube between an anode solution of 

 Na^SO^ and a cathode solution of H^SO^ ; for the praseobisul- 

 phate, by its similar behavior ; and for diamine-cobalt-potas- 

 sium-nitrite, by its movement toward the anode, between solu- 

 tions of HjSO^ (anode) and acetic acid (cathode). The results 

 were checked by direct electrolysis of the pure solution in a W- 

 shaped tube and analysis of the solution in the neighborhood 

 of the electrode ; in the case of chlorpurpureo-cobalt-nitrate 

 (ClCo(NH3)5).(N03)2 the amount of chlorine in the neighbor- 

 hood of the zinc cathode increased on electrolysis, and was les- 

 sened at the anode ; in the case of the diamine-cobalt-potassium- 

 nitrite the cobalt collected in the neighborhood of the anode. 



Bredig's conception of methyl orange as an amphoteric elec- 

 trolyte was discredited by the fact that when a strongly acid 

 solution was electrolyzed in a U-tube between solutions of acid 

 no movement of the colored layer toward the cathode could be 

 detected ; on the other hand, when the meth3'l orange solution 

 was only weakly acid, or alkaline, the colored solution moved 

 toward the anode. 



