66 Prof. J. A. Fleming on the 



This table of observations shows us that taking the lamp at 

 any definite voltage, the potential- difference between the 

 positive electrode and a cylinder embracing the carbon 

 filaments is greatest when that cylinder is as low down near 



Table No. 4.— Cubve No. 4. 



S 



40 



35 



SO 



2-5 



2-0 







BHra 



■■■■I 



earn 



«■■■■ 



■■■■ 





■■hb 





■MB 





■BOB 



inipbl 







"~~ ;!"""["";! "T~ 



Iffll 1 



Bll II 



mm in il 



■ 1H0I 



IBHHB 



■■■ria 



■hI 



■■mi 



liBHIE 



■■■■i 



StJE^mHol 



■mm 



MIS 



fc^ai 



nwpl 







40 42 



44 46 48 50 52 54 56 

 Working Yolts of Lamp. 



58 60 



the foot of the negative leg of the carbon as possible. If the 

 cylinder is placed near the top of the negative leg that 

 potential-difference becomes less. If the cylinder is taken 

 near the top of the positive leg or near the base of the positive 

 leg it is least, and it seems to be a minimum when the cylinder 



