1. McCollum, E. V., Simmonds, N., and Pitz, W.: The relation of unidentified dietary factors, fat-soluble A and water-soluble B, of the diet to the growth promoting properties of the milk, Jour. Biol.

Chem., 1916, xxvii, 33. McCollum, and Simmonds: The nursing mother as a factor of safety in the nutrition of the suckling, Amer. Jour. Physiol., 1918, xlvi, 275. Also unpublished data. 2. Osborne, T. B., and Mendel, L. B.: The role of gliadin in nutrition, Jour. Biol. Chem., 1912, xii, 473. Hart, E. B., Nelson, V. E., and Pitz, W.: Synthetic capacity of the mammary gland. 1. Can the gland synthesize lysin?, Jour. Biol.

Chem., 1918, xxxvi, 291.

3. McCollum, E. V., and Davis, M.: The necessity of certain lipins in the diet during growth, Jour. Biol. Chem., 1913, xv, 175.

4. Osborne, and Mendel: Further observations on the influence of natural fats on growth, Jour. Biol. Chem., 1915, xx, 379.

5. Decaisne, E.: Ueber die Veranderungen, welche die Frauenmilch erleidet in Folge unvollstandiger Ernahrung, Gazette medec. de Paris, 1871, 317.

6. Momm, and Kraemer: Hat der Krieg einen Einfluss auf die Zusammensetzung der Frauenmilch?, Munchen. med. Wochenschr., 1917, lxiv, 1419.

7. Kaupe, W.: Muttermilch und Krieg, Monatschrift fur Kinderheilkunde, Orig. 1918 -19, xv, 83. Leipzig u. Wien.

8. Voegtlin, C, and Harries, R. H.: The occurrence of pellagra in nursing infants with observations on the chemical composition of human milk from pellagrous mothers, U. S. Public Health Service, Hyg. Lab. Bull. No. 116, 1920.

9. Eccles, C. H., and Palmer, L. S.: The influence of parturition on the composition and properties of the milk and milk fat of the cow, Jour. Biol. Chem., 1916, xxvii, 313.

10. Andrews, V. L.: Infantile beri-beri, Philippine Jour. of Sci., Series B., 1912, vii, 67.

11. McCollum, and Simmonds: The American Home Diet, An Answer to the Ever Present Question: What shall We have for Dinner?, Detroit, 1920.

12. Babcock, S. M.: Wisconsin Agr. Exper. Sta. Ann. Report 1905, 129.

13. Hart, E. B., Steenbock, H., and Ellis, N. R.: Influence of diet on the anti-scorbutic potency of milk, Jour. Biol. Chem., 1920, xlii, 383. Hart, Steenbock, and Smith: Effect of heat on the anti-scorbutic properties of some milk products, Ibid., 1918-19, xxxviii, 305. Hart, Steenbock, and Ellis: Anti-scorbutic potency of milk powder, Ibid., 1921, xlvi, 309.

14. Dutcher, R. A., Eccles, C. H., Dahle, C. D., Mead, S. W., and Schaefer, O. G.: The influence of diet of the cow upon the nutritive and anti-scorbutic properties of cow's milk, Jour. Biol. Chem., 1920-21, xlv, 119.

15. McCollum and Simmonds: Unpublished data.

16. Hess, A. F., and Unger, L. J.: The diet of the negro mother in New York City, Jour. Amer. Med. Assn., 1918, lxx, 900, March 30. Hess, A. F., Unger, L. J., and Supplee, G. C: Relation of fodder to the anti-scorbutic potency and the salt content of milk, Jour. Biol. Chem., 1920-21, xlv, 229.

17. King, E. Truby: The story of the teeth and how to save them, London.

The natural feeding of infants, London, 1918.