1. These results are at variance with those of Gladys Boyd,1937
2. Addis, T. (1925). J. Amer. med. Ass., 85, 163.
3. Boyd, G. (1927). Canad. med. Ass. J., 17, 894.
4. Boyle, H. H., Aldrich, C. A., Frank, A., and Borowsky, S. (1937). J. Amer. med. Assoc.
5. de Leeuw, K. (1937). Acta paediatr., Stockh., Supp. 1, 20, 3.