Ionisation of Air by Ultra-violet Light

  title={Ionisation of Air by Ultra-violet Light},
  author={Frederick Palmer},
SINCE Lenard has shown that ionisation of the air is produced by light of short wave-length, it has seemed advisable to extend his researches into the region of the extreme ultra-violet, discovered by Schumann, and to investigate the effect on air of light of wave-length below λ 1850. 
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