Edison Effect in Glow Lampi 



65 



the positive electrode of the lamp was observed as before by 

 means of the milamperemeter. The results are given in 

 Table 4. 



Table No. 4. Lamp No. 3. Milamperemeter. 



Table showing the potential-difference between a platinum 

 cylinder embracing the carbon and the positive electrode 

 of the lamp, and the current flowing through the galvano- 

 meter in milliamperes ; for the four positions shown in 

 fig. 6. 



Working 



volts of the 



lamp. 



Volts be- 

 tween cylin- 

 der and 

 positive 



electrode. 



Current in 



milli- 

 amperes 

 through the 

 galvano- 

 meter. 



Working 



volts of the 



lamp. 



Volts be- 

 tween cylin- 

 der and 

 positive 



electrode. 



Current in 

 milli- 

 amperes 

 through the 

 galvano- 

 meter. 



Position (1). 



Position (2). 



43 

 45 

 46 

 47 

 48 

 49 

 50 

 51 



1-6 



2-4 



2-9 

 3-7 

 4-2 

 4-7 

 5-2 

 5-9 



•25 

 •38 

 •46 



•58 

 •67 

 •74 

 •82 

 •93 



43 

 45 



46 



47 

 48 

 49 

 50 

 51 



1-2 

 2-0 

 2-9 

 3-7 

 4-2 

 4-9 

 5-1 

 5-3 



•19 

 •31 



•36 



•58 

 •67 

 •78 

 •81 



•84 



Position (3). 



Position (4). 



43 

 45 



46 

 47 



48 

 49 

 50 

 51 



2-1 



3*9 



4-9 



6-8 



8-2 



10-4 



12-3 



14-9 



•33 

 •62 



•78 

 1-08 

 1-30 

 1-65 

 1-95 

 2-36 



43 

 45 

 46 

 47 



48 

 49 

 50 

 51 



2-2' " 



4-0 



5-9 



8-0 



9-8 

 12-6 

 15-1 

 18-0 



•35 

 •63 

 •94 

 1-26 

 1-55 

 1-99 

 2-38 

 2-85 



These observations are plotted in Curve No. 4. 



Phil. Mag. S. 5. Vol. 42. No. 254. July 1896. 



F 



