Ionisation of Air by Ultra-violet Light

@article{PalmerIonisationOA,
  title={Ionisation of Air by Ultra-violet Light},
  author={F. Palmer},
  journal={Nature},
  volume={77},
  pages={582-582}
}
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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