the Electrical Resistance of Bismuth. 



343 



(2) Tempered Rods. 







W. 



K. 



"Variation for 

 1° between 0° and 100°. 





Bismuths. 



Tempera- 

 tures. 



Electrical 



resistances 



in U.S. 



Bo- 



Latest 



o 

 



0-0965 







17-6 



0-0988 



+000199 



10 3 x 139-86 



Brommsdorflf. 1 



493 



01040 







99-7 



0-1157 







f 







0-1745 







Classen I. ... \ 

 [ 



17-5 



49-1 

 99-7 







01729 

 0-1687 

 01640 



0-1275 



-0-000603 



10 3 x 246-91 



Classen II. 



16-7 



0-1287 







1st rod. ] 



49-7 



0-1319 



+000106 



10 3 x 16666 



1 



99-5 

 



0-1410 

 0-1292 







Classen II. 



169 



0-1310 







2nd rod. 1 



50-3 

 99 



0-1353 

 0-1456 



+000128 



10 3 x 157-48 



( 



1 







18 

 99-8 



0-1205 

 01215 

 0-1342 







Classen II. \ 

 3rd rod. 



It is allowed to cool slowly. 





1 0-1203 I 







99-7 1 0-1343 +0-00116 



10 3 x 163-40 





A second observation showed that the resistance 



3 now remain 



k. 



constant. 







( 







19-7 

 99-8 



0-1135 

 0-1127 

 01139 









It is allowed to cool slowly. 





Classen III. 

 1st rod. 







01128 







20 



01121 



+0-00009 



10 3 x 204-50 





48 



0-1114 









99-8 



0-1138 









A second set of observations of the electrical resist 



ances from 0° 



, 



to 100° showed that the values remained constc 



int. 



( 







20 



99-3 



0-1376 

 01363 

 01372 







1 



It is allowed to cool slowly. 





Classen III. J 

 2nd rod. 







01364 







20 



01355 



+000005 



10 3 x 208-33 





48 



01346 









99-8 



0-1371 









A second set of observations showed that the 



values of the 



1 



resistances remained constant. 





