174 Drs. A. Matthiessen and C. Vogt on the Influence of 



hire of which was kept as near 13° C. as possible. Of course, the 

 tube was first placed on the empty trough and allowed to cool 

 gradually before the water was poured in. 



V. Each amalgam was made twice, and] its resistance deter- 

 mined in different tubes. 



In the following Tables the results obtained are given. They 

 have been compared with the gold-silver alloy*, whose conduct- 

 ing power was taken at 0°=100 : — 





Table I.- 



-Mercury-Bismuth Series. 





To 100 

 parts mer- 

 cury were 



added 



Volumes 

 per cent. 



Conducting 



power, 

 observed. 



Tempera- 

 ture. 



Mean 



Conducting 

 power. 



of the 



Tempera- 

 ture. 



Conducting 



power, 

 calculated. 



Difference. 



005 



01 



0-2 



0-5 



1-0 



0-069 

 0138 

 0-276 

 0-686 

 113 



10-932 

 10-932 



10-946 

 10-947 



10-984 

 10-973 



11-066 

 11-063 



11-199 

 11-200 



130 

 131 



133 

 130 



12-8 

 13-3 



13-5 

 13-4 



13-2 

 13-3 



10-932 



10-9465 



10-9785 



11-0675 



11-1995 



1305 

 1315 

 1305 

 13-45 

 13-25 



10-908 

 10-906 

 10-901 

 10-890 

 10-876 



+0024 

 +0-040 

 +0-077 

 +0-177 

 +0-323 



Table II. — Mercury-Lead Series 



To 100 



parts mer- 

 cury were 

 added 



Volumes 

 per cent. 



Conducting 



power, 

 observed. 



Tempera- 

 ture. 



Mean 



Conducting 

 power. 



of the 



Tempera- 

 ture. 



Conducting 



power, 

 calculated. 



Difference. 



001 



00119 



10-920 

 10917 



13°-2 

 13-2 



10-9185 



13°2 



10-915 



+0-003 



0025 



0-0298 



10-929 



10-928 



130 

 131 



10-9285 



1305 



10-922 



+0-006 



005 



00596 



10-944 

 10-944 



13-2 

 13-2 



10-944 



13-2 



10-935 



+0009 



01 



0119 



10-972 

 10-973 



13-3 

 133 



10-9725 



133 



10-960 



+0-012 



02 



0-238 



11037 

 11-038 



13-2 

 13-6 



11-0375 



13-4 



11-009 



+0-028 



0-5 



0-593 



11-219 

 11-225 



132 

 130 



11-222 



131 



11157 



+0-065 



10 



119 



11-493 

 11-497 



13-2 

 131 



11-495 



1315 



11-407 



+0-083 



2-0 



2-33 



11-702 

 11-708 



131 



13-2 



11-705 



1315 



11-882 



-0177 



40 



4-55 



11-867 

 11-879 



130 

 13-4 



11-873 



13-2 



12-809 



-0-936 



* Phil. Mag. February 1861. 



