ERRATA.VOL. 46, 1949.Page. Line.VOL. 48, 1951.3347265For or to that at the nucleus read or to a 2 v / W at the nucleus.For 0.8 f 2 kcal. read 0.8 f 0.2 kcal.21 1 5 For 3-chloro-2-hydroxy-5 : 6-dimethoxybenzoic acid read3-chloro-2-hydroxy-4 : 6-dimethoxybenzoic acid