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Last spring an informal conference on atmospheric chemistry, initiated by Prof. C. G. Rossby, was held at the Meteorological Institute of the University of Stockholm and a note on this conference was published in Tellus (ERIKSSON, 1954). Among other things a new network of collecting stations for precipitation and air samples was discussed; this network was to extend over the whole of Scandinavia and Britain.
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Egnér et al. (1955) studied this question.
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