308 



Mr. A. K. Chapman on the 

 The Hall Effect in Bismuth. 







Ed 





H. 



ExlO 4 . 



K— — 



(K)cu- 



208 



0-84 



7-49 



14130 



486 



1-81 



6-90 



13020 



1050 



3-68 



6-53 



12320 



1690 



5-55 



6-12 



11550 



3150 



8-25 



4-85 



9150 



3600 



9-10 



4-66 



8790 



4670 



11-0 



4-37 



8250 



5680 



12-2 



3-99 



7530 



7060 



13-9 



3-63 



6850 



7310 



14-6 



3-69 



6960 



8320 



15-7 



3-49 



6580 



10400 



175 



3-11 



5870 



10570 



181 



3-16 



5960 



The Corbino Effect in Bismuth, 



H. 



m/H. 



(WH) Cu . 



R. 



cXlO 7 . 



156 



0-673 



140-0 



12950 



303* 



510 



0-680 



141-4 



13080 



306- 



1125 



0-657 



136-7 



12640 



296- 



1720 



0-593 



1140 



11410 



267- 



2020 



0-569 



118-4 



10950 



256- 



2330 



0-549 



114-2 



10560 



; 247* 



3320 



0-464 



96-5 



8930 



209- 



4050 



0-442 



91-9 



8500 



199- 



5170 



0-394 



820 



7580 



177- 



5850 



367 



76-3 



7060 



165- 



6720 



0-342 



71-1 



6850 



154- 



8210 



0-338 



70-3 



6500 



152- 



In the above tables d is the thickness of the plate 

 (0'0919 cm. for the bismuth plate) ; E is the potential 

 difference across the plate ; I is the primary current flowing 

 through the plate ; H is the magnetic field : K is 530 X 10 " 6 

 for copper ; m/H. is 1/208 for copper; (??i/H) Cu is m/H for 

 bismuth divided by m/H for copper ; R is (m/H) Cu multiplied 

 by the ratio of the specific resistances of bismuth and copper. 



A similar notation is used throughout the remainder of 

 this work. 



Fig. 1 shows the plot of the two effects against the values 

 of H. It is seen that both decrease very quickly with 

 increasing field, the Corbino effect falling off the more 

 rapidly. 



