Abstract
IN recent months an apparatus has been set up at Kew Observatory for investigating atmospheric ionisation. A continuous record is taken of the ionisation currents to the central electrodes of three cylindrical condensers, through which air is aspirated. The outer cylinders of the condensers are maintained at three different voltages, which are automatically reversed in sign every five minutes, so that positive and negative ions are alternately collected by the central electrodes. The ionisation currents are recorded photographically on bromide paper by light reflected from the mirrors of three Dolezalek electrometers. The mouths of the condensers project through the wall of a hut and are 10 cm. apart from each other. The mean height above the ground, a grass lawn, is 1.5 metres.
Similar content being viewed by others
Article PDF
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
SHEPPARD, P. Character of Atmospheric lonisation. Nature 129, 169 (1932). https://doi.org/10.1038/129169a0
Issue Date:
DOI: https://doi.org/10.1038/129169a0
This article is cited by
-
Structure of Polished Solids
Nature (1932)
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.