262 



Mr. F. E. Smith on Cadmium Amalaams 



Table IV. 



Giving the observed E.M.F/s at 0° C. of various cells con- 

 taining amalgams with from 1 to 25 per cent, of cadmium. 



Observed E.M.F.'s = 1*01 840+ the differences given in the table, 

 the differences being in hundred-thousandths of a volt. 



Percentage 



of 

 Cadmium. 



I 



Group I. 

 Cadmium 



from 

 Baird and 

 Tatlock. 



Group II. 



Electrolytic 

 Cadmium. 



Group III. 



Cadmium 



from 

 Ivahlbaum. 



Group IV. 



Cadmium 



from 



Harrington. 



Group V. 



Cadmium 



from 



Merck. 



1 



1 



-1197 



-365 



+35 



34 



35 



35 



36 



36 



36 



36 



37 



40 



41 



47 



50 



249 



457 



673 



560 



1101 



1295 



1564 



1613 



(a) 



-1203 

 -370 

 + 35 

 35 

 35 

 35 

 35 

 36 

 36 

 37 

 37 

 38 

 39 

 40 



72 



40 



454 



451 



78 



455 



1047 



1612 







(*) 



-1205 



- 372 



+ 34 



+ 34 



+ 35 



35 



36 



36 



36 



37 



37 



37 



38 



38 



3S 

 38 

 65 

 45 

 48 

 49 

 866 

 1580 



— 



— 



+34 

 34 

 35 



36 



37 



39 



378 



654 

 1111 



2465 



2 



3 



+34 



4 



5 



34 

 35 



35 



35 



40 



38 



36 



41 



460 



519 



574 



944 



720 



1223 



34 

 34 



34 

 36 



42 



443 



938 

 1082 



6 



7 ... 



8 



9 



10 



11 



12 



12-5 



13 



135 



14 



14-5 



15 



16 



17 



18 



19 



— 1601 

 2420 — 



20 



25 









N.B. — An interval of 36 hours elapsed between observations {a) and (/>). 

 In this interval the temperature of the cells was raised to 65° C. for 1 hour, 

 and the cells allowed to cool very slowly in the bath. They were then placed 

 in ice and the observations (b) taken 6 hours afterwards. 



alcohol cooled with solid COo, the temperature being about 

 — 50° C. The other constituents of the cell were added, the 

 vessel hermetically scaled and immediately afterwards it was 

 placed in crushed ice. The observed E.M.F.'s at 0° C. were 

 as follows : — 



