Foreign Metals on the Electric Conducting Power of Mercury. 175 

 Table III. — Mercury-Tin Series*. 



To 100 

 parts mer- 

 cury were 



added 



Volumes 

 per cent. 



Conducting 



power, 



observed 



Tempera- 

 ture. 



Mean 



Conducting 

 power. 



of i 



Tempera- 

 ture. 



Conducting 



power, 

 calculated. 



Difference 



001 



0025 



005 



01 



0-2 



0-5 



10 



2-0 



40 



0-0186 



0-0465 



0-0930 



0-1.86 



0-371 



0-929 



1-83 



3-59 



6-93 



10-929 

 10-930 



10-946 

 10-945 



10-978 

 10-977 



11041 

 11042 



11172 

 11-170 



11-528 

 11-529 



11-796 

 11-788 



12-329 

 12-307 



13-204 

 13-130 



12-2 

 121 



12-4 

 12-6 



12-6 

 12-8 



13-2 

 130 



13-2 

 13-2 



13-2 

 13-0 



13-2 

 13-2 



130 

 13-0 



12-8 

 12-8 



10-9295 



10-9455 



10-9775 



110415 



11171 



11-5285 



11-792 



12-318 



13-167 



1215 



125 



12-7 



131 



13-2 



131 



13-2 



13-0 



12-8 



10-922 

 10-941 

 10-973 

 11036 

 11-161 

 11-538 

 12147 

 13-335 

 15-595 



+0-007 

 +0-005 

 +0-004 

 +0-005 

 +0-010 

 -0010 

 -0-355 

 -1017 

 -2-428 



* In my paper (Phil. Mag. Sept. 1861) the conducting power of the gold- 

 silver alloy at 0° C. was brought into calculation by mistake as = 226, 

 instead of 100 as stated. The values given in Table V. in that paper must 

 be divided by 2*26 in order to make them comparable with the above. 

 Taking, as above, the gold-silver alloy 100° at 0°, the values found for 

 the tin-mercury series, &c. ought to have been — 



Calculated conducting 

 power. 



" Pure mercury conducts = 10 - 82/ at 18 C. 



alloyed with (M Bi = 10'876 at 186 

 0-01 Sn= 10-845 at 18-4 

 0-02 „ = 10-858 at 18-0 



0-05 



0-1 



0-2 



0-5 



1-0 



2-0 



4-0 



= 10-898 at 18-2 

 = 10-956 at 18-8 

 = 11-080 at 19-0 

 == 11-442 at 18'4 

 = 11-779 at 18-6 

 = 12-239 at 18-8 

 = 13-137 at 19-0 



10-823 

 10-840 

 10-850 

 10-889 

 10-951 

 11-0/1 

 11-439 

 12031 

 13-162 

 15-527 



" Further, for the calculations the conducting power of tin was taken equal 

 to 76*146, and that of bismuth 7'9115, &c." It must be borne in mind 

 that the values given in the Table were deduced from determinations made 

 at different temperatures from those given in the present paper ; the differ- 

 ences may therefore be due chiefly to the temperature not being the same. 

 The relative results, however, are in both cases the same. The values given 

 for the conducting powers of tin and bismuth are those taken from my 

 paper "On the Electric Conducting Power of the Metals" (Phil. Trans. 

 1858).— A. M. 



