Foreign Metals on the Electric Conducting Power of Mercury. 177 

 Table VI. — Mercury- Silver Series. 



To 100 

 parts mer- 

 cury were 



added. 



Volumes 

 per cent. 



Conducting T 



Mean of the 

 Conducting 



power. 



Tempera- 

 ture. 



Conducting 



power, 

 calculated. 



Difference, 



001 



0025 



005 



01 



0-2 



0-5 



10 



00130 



0-0324 



0-0648 



0129 



0-259 



0-644 



1-28 



10-920 

 10-918 



10930 

 10-923 



10-953 

 10-943 



10-985 

 10-983 



11-049 

 11-047 



11-208 

 11-192 



11-561 

 11-572 



13-2 

 130 



13-2 

 13-2 



13-4 

 13-4 



130 

 130 



13-2 

 13-4 



12-8 

 13-2 



130 

 130 



10-919 



10-9265 



10-948 



10-984 



11-048 



11-200 



11-5665 



131 

 13-2 

 13-4 

 130 

 13-3 

 130 

 13-0 



10-917 

 10-927 

 10-944 

 10-978 

 11046 

 11-247 

 11-581 



+0002 

 0-000 

 +0-004 

 +0-006 

 +0-002 

 -0047 

 -0015 



Unfortunately, owing to the tendency of the amalgams to 

 solidify, or rather to crystallize, we were obliged to discontinue 

 the determinations in some of the series much sooner than in 

 the others, as it was impossible to obtain constant results. In 

 the mercury-bismuth series the turning-point (for there must be 

 one, as bismuth has a lower conducting power than mercury) 

 occurs between 1 and 2 per cent. ; this point, however, could not, 

 for the above reason, be accurately determined. 



For the calculations, the conducting powers and specific 

 gravities employed are given in the following Table : — 



Table VII. 





Conducting power 

 at 13°*. 



Specific gravity f. 



Bismuth 



7-915 



10-910 



52-640 



78-507 



184-064 



494-684 



633-327 



9-822 

 13-573 

 11-376 



7-294 



7-148 



19-265 



10-468 



Mercury 



Lead 



Tin 



Zinc 



Gold 



Silver 





From the foregoing it will be seen that mercury, when alloyed 



* The values given for the conducting powers are taken from a paper 

 "On the Influence of Temperature on the Conducting Power of the 

 Metals," bv A. Matthiessen and M. v. Bose, which will shortly be published, 



t Phil. Trans. 186U 

 Phil. Mag. S. 4. Vol. 23. No. 153. March 1862. N 



