540 Mr. J. J. Dowling and Miss K. M. Preston on the 



electrolyte) shows that by confining our attention to a fixed 

 value of the capacity (say, 150 fi/ju £.) the corresponding 

 ordinates decrease by amounts nearly proportional to the 

 increments of the resistance. 



§ 6. Observations were now carried out on these lines, both 

 with electrolytic resistances and with the practically non- 

 inductive resistances afforded by lengths of No. 40 s.w.g. 

 Manganin wire wound in small helices. The results of such 

 observations are shown in fig. 3. 



Fig. 3. 



320 























240 







f 1 - f 



H. J 



m. 













160 



O 



it 











c 



-C 

 vS 











80 



0) 



-p 

 o 

 £ 











> 



a / 















V 



Zero fc 



H, 











12 3 4 5 



Curve I, I div. = 20 cms. Manganin. 



IE; ••» = 4 " Electrolyte (3 cm. tube). 



IE; » = -5 " " (I cm. » ). 



A comparison of the same resistances was then made by 

 the Kohlrausch method, using a metre bridge. The following- 

 table shows the results. 



Kohlrausch method : — 



100 cms. wire has same resistance as 12*5 cms. of CuS0 4 sol. in 3 cm. tube. 



l'O 



