Electricity in a uniform plane conducting Surface, 485 



Second set of Resistance experiments, April 1875, 

 Case 1. Both poles on the edge of the circular disk. 

 r= 13*43 centims., p = '163 centim., a?="471. 



Number of 

 experiments. 



2a. 



s. 



e. 



11= X. 



€ 



R 



i 2a 

 log — 



P 



8 

 6 



26764 

 26773 



13 03 

 13-23 



•9705 

 •9700 



12-95 

 1307 



5-85 

 5-90 









Mean 



...5-87 



L = 41og — ; 



11 



hi 



2a 



= 4C; 2C = 2*935. 



Ctfse 2. One pole at the centre, the other on the edge (as at 

 a t fig. 4). 



r — 13*43 centims.; p = *163 centim., #=*425. 



Number of 

 experiments. 



AB = r. 



s. 



e. 



R = i-x. 

 e 



JL. 

 i og r 



3 



13-43 



9-37 



1035 



8-63 



4-504 



L = 31o 



V 



JL 



log r - 



= 3C; 2C = 3-003. 



Case 3. Both poles inside- the disk at distances CA, CB re- 

 spectively from its centre. 



r= 13*43 centims., p = *163 centim., # = *38. 



AB. 



CA. 



CB. 



s. 



e. 



R 



= £-*. 



c 



R 



13-85 



5-55 



91 



7-97 



10595 



714 



1-63 



2000 



10-9 



91 



8-94 



10395 



8-22 



1-55 



12-20 



10-9 



4-45 



7*64 



1-0625 



6-81 



1-58 



725 



4-5 



3-62 



6-45 



10845 



5-57 



1-63 



700 



72 



90 



6-50 



1-0850 



5-62 



1-61 



900 



00 



90 



717 



1-0735 



6-30 



1-68 



12 08 



7-7 



4-45 



759 



10650 



675 



1-64 



1512 



77 



7-7 



804 



10615 



7-20 



1-59 









i 





Mean 



...1-615 



