Edison Effect in Glow Lamps. 

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



61 



Table showing the potential-difference between the middle 

 plate and positive electrode of the lamp at various posi- 

 tions of the plate and at various working voltages. 





Volts be- 



Current 





Volts be- 



Current 



Working 



tween the 



through the 



Working 



tween the 



through the 



volts of the 



middle plate 



galvano- 



volts of the 



middle plate 



galvano- 



lamp. 



and positive 



meter in mil- 



lamp. 



and positive 



meter in mil- 





electrode. 



liamperes. 





electrode. 



liamperes. 



Middle plate at -^ of whole 



Middle plate at f of whole 



distance from negative leg. 



distance from negative leg. 



31 



•9 



•142 



31 



•9 



•142 



34 



2-2 



•317 



34 



1-4 



•222 



37 



6-0 



•952 



37 



2-2 



•349 



39 



10-2 



1-61 



39 



25 



•396 



41 



14-2 



2-24 



41 



2-9 



•460 



43 



16-8 



2-66 



43 



30 



•476 



Middle plate at £ of whole 



Middle plate at -^ of whole 



distance from negative leg. 



distance from negative leg. 



31 



•9 



•142 



31 



•9 



•142 



34 



1-8 



•285 



34 



1-5 



•238 



37 



5-1 



•809 



37 



3-4 



•539 



39 



7-0 



1-11 



39 



48 



•761 



41 



8*7 



1-38 



41 



5-7 



•904 



43 



9-5 



1-50 



43 



6-8 



1-07 



Middle plate -| of whole 





distance from negative leg. 





31 



'9 



•142 



34 



1-7 



•269 





37 



3-5 



•555 





39 



4-3 



•682 





41 



5-6 



•888 





43 



6-2 



•983 





