JOURNAL has become available since the clinical study was beguin. Thus Widenba-uer and Heckler (1939) found that cows' milk varied from 13 to 57 y/ per 100 gramnmes, with an average figure of 32 y, and human milk from forty-two working-class women varied from 2 >a to 36 per 100 grammes. Morgan and Haynes (1939) similarly found that the milk of two women on very different B, intakes contained 11 and 32 y per .100 grammes, and that 5 mg. daily of crystalline B1 given to both mothers for a month resulted in an increased B1 content of the milk which had previously contained 11 but no increase in the other milk. From these considerations and from the clinical resuLlts recorded it therefore appears probable that supplements of vitamin B, derived from natural sources and providing not less than 100 units daily can usefully be given to infants whose progress is unsatisfactory. Acknowledgments are made to Dr. Chodak Gregory for permission to publish these observations and for her advice. also to Mr. H. C. H. Graves of Vitamins Limited for supplying the vitamin B, preparation used at a much reduced rate and for statistical treatment of the results.

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