Conductivity along a Glow Discharge and in Flames. 361 



conductivity) in the Faraday dark space is again very well 

 marked, while, with the exception of the last stria, where 

 the absorption has probably been influenced by the near 



Fi£. 6. 



30 



20 



10 































































































































1 



Ifc 



m 



t 



fch 







ik 



28 



24 



20 



/6 



/2 cm 



proximity of the highly conducting dark space, the maxi- 

 mum wave-amplitude corresponding to minimum conduc- 

 tivity always occurs at the negative front near the brightest 

 part of each stria. 



The same minimum of absorption was always observed in 

 numerous measurements on glow-discharges, both in air and 

 hydrogen. 



Again, the observations of fig. 7 were taken with the wire 

 attachment of fig. 4, the discharge being again in hydrogen, 

 of pressure 0*145 mm., while the steady discharge current 

 was 0*6 X 10~ 3 amp. The cathode is here at the abscissa 

 and anode at 42*2. The action of the discharge on the waves 

 is here more pronounced, and ngain, as in the former ease, 

 the maxima of wave-amplitude (minima of absorption and 

 conductivity) are found at the negative heads near the 



