\'ol. 79 tensity changes. This statement is not intended to preclude minor changes in band shape on m-substitution. However, it may be noted that frequently emax and oscillation strengths are directly related one to another (cf. ref. 2 5 ) . knowledge t h i receipt of research gr&ts fro& the Of Canada and the Research Corporation of New York. Research (25) B M. Wepster, Rec. Irav. chim., 76, 336 (1957).
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