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Railroad ties and weather reports: U. S. Department of Agriculture Press Service No. 195

Publisher: Elsevier Science
Year: 1922
Tongue: English
Weight: 66 KB
Volume: 193
Category: Article
ISSN: 0016-0032
DOI: 10.1016/s0016-0032(22)90568-x

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CURRENT TOPICS. [J. F. I. been found recently that metal surfaces carefully freed from gases do not exhibit any appreciable photo-electric effect. It seems therefore, as if the process of electronic emission from cold metal surfaces could take place only through the intermediary of the surface-lay