20 



ROYAL SOCIETY OF CANADA 



No. 



Sait. 



Source of sait. 



metal in sait. 

 =K. 



Activity of 

 Percentage of salt. Satura- 



tion current. 



Arbitrary 



scale. =A. 



lœ 



No. 



28 

 29 

 30 

 31 

 32 

 33 



34 



K, Fe (CN) , (H,0) , 



K. Fe, C„ N„ 



K (metal) 



Na metal. 



Na Cl (evapor.) 



NaCl(rock)(l) 



NaCl(rock)(2) 



NaCl(rock)(3) 



Na J CO ,. 



Kahlbaum 



Kalilbaum 



Mercks 



Commercial 



Commercial 



Commercial 



Commercial 



Commercial 



Commercial 



37 

 36 

 100 

 100 

 39 

 39 

 39 

 39 

 43 



174 



163 



195 











66 















470 



459 



195 











169 















28 

 29 

 30 

 31 

 32 

 33 



34 



35 

 36 

 37 



Li Cl (HjO) ,. 



Lis Ce O,.... 



Li, CO....... 



Mercks 

 Mercks 

 Commercial 



9 

 23.3 

 19 



35 

 36 

 37 



38 



Rb,Al,(SO,),(H,0),, 



Commercial 



16.3 



! 



2.5 38 



39 



CsCl. 



Commercial 



80 



39 



40 

 41 

 42 

 43 



NH.Cl 



NH, Br..... 

 (NH,),CO, 

 NH, NO,. . . 



Commercial 

 Commercial 

 Commercial 

 Kahlbaum 



33 



18.4 

 37.5 



99 



14 





 

 



40 

 

 

 



40 

 41 

 42 

 43 



From this table it will be seen: — 



First. That samples of a selected salt obtained from different 

 sources exhibited widely differing degrees of activity. Two of the 

 chlorides, as Nos. 3 and 4 shew, differed by more than 40 per cent, 

 in their activities, and two of the hydroxides, Nos. 7 and 8, by nearly 

 an equal amoimt. In the case of the cyanide of potassium the variation 

 in activity was especially marked. As can be seen from Nos. 10 and 12 



