Letter | Published:

Residual lonisation in Gases

Nature volume 92, page 424 (11 December 1913) | Download Citation

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Abstract

FROM observations made by Simpson and Wright, the writer, and others, it is now known that the ionisation in air confined in airtight clean zinc vessels is about 8 or 9 ions per c.c. per second when the observations are made on land where the soil contains only such minute traces of radio-active substances as are found in ordinary clays or loams.

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Affiliations

  1. The Physical Laboratory, University of Toronto, November 13.

    • J. C. MCLENNAN

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DOI

https://doi.org/10.1038/092424a0

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