Description:
<jats:p>T and D measurements on a set of atmospheric hydrogen samples of 1957 and 1958 are reported, the samples being taken nearly continuously with only a few days distance from each other. Appreciable variations are found, which are only partly due to local admixture of industrial H<jats:sub>2</jats:sub> . Especially one peak a factor of ten higher than normal was found, which is very probably due to direct injection of unburnt tritium in a nuclear explosion.</jats:p>