649 TRITIUM, KG 107 | 1 oP TET GLOBAL DISTRIBUTION OF TRITIUM CUMULATIVE PRODUCTION OF TRITIUM 10° L 1952 J 1953 1954 | 1955 | | | | I 1956 1957 1958 1959 1960 1961 I | 1962 1963 rf Litiit 1 _4 Liliual 15 T.U. COSMIC-RAY PRODUCTION Lituul TRITIUM CONCENTRATION IN PRECIPITATION, OTTAWA | 10? 7 a T.U. a T rTM 104 — (a) Ve 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 (b) Fig. 1—The cumulative production of tritium and the response in Ottawa precipitation. GENERAL OBSERVATIONS ON GLOBAL TRITIUM DISTRIBUTION Global tritium information is presented in Tables 1 to 5 and in Figs. 2 to 9. The tables provide organized data from five regions of the

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