at the Electrodes in Vacuum- Tube Discharge. 619 



Table II. 

 Drop in Potential at the Electrodes with Distance apart. 

 Gas-pressure 0*5 mm. Current 0*5 m.a. 



Distance in 



Drop at Anode 



Drop at Cathode 



Position of Anode 



Millimetres. 



in Volts. 



in Volts. 



in Path of Discharge. 



82 



23 





Positive column. 



74 



23 







70 



25 







Faraday dark space. 



62 



28 







58 



30 







54 



32 







50 



32 







44 



29 







37 



25 







32 



22 







27 



19 







23 



4 





Negative glow. 



19 



10 







16 



1-2 



425 





13 



1-1 







9 



1-2 







8 





430 





7 



25 







Cathode dark space. 



6 



61 



485 





5 





605 





4 





800 























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These curves exhibit the same peculiarity of form, when 

 compared to the potential gradient in the gas under the same 



