82 Prof. J. A. Fleming on the 



'positive leg, and a series of observations taken as usual of the 

 current flowing through the milamperemeter when connected 

 between the middle plate, placed between the carbon legs, 



Fig. 13. 



and the positive electrode of the lamp. The results are as 

 tabulated below in Table No. 12. The lamp took 1*25 ampere 

 of current at a working electromotive force of 42 volts. 



Table No. 12. Lamp No. 9. Mil amperemeter. 



Table showing the potential-difference between the middle 

 plate and positive electrode of the lamp, and the current 

 flowing through a galvanometer connecting them, when 

 the positive leg of the carbon is shielded in a glass tube. 





Potential- 







Potential- 







difference of 



Mill iam per e 





difference of 



Mi Hi amp ere 



Working 



middle plate 



current 



Working 



middle plate 



current 



volts of the 



and positive 



through gal- 



volts of the 

 lamp. 



and positive 



through gal- 



lamp. 



electrode 



vanometer. 



electrode 



vanometer. 





in volts. 







in volts. 





36 



•2 



•032 



45 



6-9 



•936 



38 



•3 



•048 



46 



7-5 



1-19 



40 



•95 



•12 



47 



9-7 



1-53 



41 



1-2 



•19 



48 



12-4 



1-96 



42 



1-8 



•29 



49 



15-1 



2-39 



43 



3-1 



•49 



50 



19-1 



3-03 



44 



4-2 



'66 



51 



23-1 



3-66 



