1. Steenbock, H., and Gross, E. G.: Fat-soluble vitamine. ii. The fatsoluble vitamine contents of roots together with some observations on their water-soluble vitamine content, Jour. Biol. Chem., 1919, xl, 501.

2. Steenbock, H., and Boutwell, P. W.: Fat-soluble vitamine. iii. The comparative nutritive value of white and yellow maizes, Jour. Biol. Chem., 1920, xli, 81.

3. McCollum, E. V., Simmonds, N., and Pitz, W.: The supplementary dietary relationship between leaf and seed as contrasted with combinations of seed with seed, Jour. Biol. Chem., 1917, xxx, 13.

4. Osborne, T. B., and Mendel, L. B.: The vitamines in green foods, Jour. Biol. Chem., 1919, xxxvii, 187; Ibid., 1919, xxxix, 29; Ibid., 1920, xli, 451.

5. Steenbock, and Gross: Fat-soluble vitamine. iv. The fat-soluble vitamine content of green plant tissues together with some observations on their water-soluble vitamine content, Jour. Biol. Chem., 1920, xli, 149.

6. Drummond, J. C: Researches on fat-soluble accessory substance.

1. Observations upon its nature and properties, Biochem. Jour., 1919, xiii, 81.

7. Steenbock: White corn vs. yellow corn and a probable relation between the fat-soluble vitamine and yellow plant pigments, Science, 1919, 1, 352.

8. Steenbock, H., Boutwell, P. W., and Kent, H.: Fat-soluble vitamine.

1. Jour. Biol. Chem., 1918, xxxv, 517. Steenbock, and Boutwell: Fat-soluble vitamine. vi. The extractability of the fat-soluble vitamine from carrots, alfalfa, and yellow corn by fat solvents, Jour. Biol. Chem., 1920, xlii, 131.

9. Drummond, J. C, and Coward, K. H.: The nutritive value of animal and vegetable oils and fats considered in relation to their color, Biochem. Jour., 1920, xiv, 668. Drummond, J. C, and Rosenheim, O.: The relation of lipochrome pigments to the fat-soluble accessory food factor, Lancet, 1920, 1, 862. 10. Stevenson, M.: A note on the differentiation of the yellow plant pigments from the fat-soluble vitamine, Biochem. Jour., 1920, xiv, 715.

11. Palmer, L. S., and Kennedy, C: The relation of the plant carotinoids to growth and reproduction of the albino rat, Jour. Biol. Chem., 1921, xlvi, 559.

12 Palmer, L. S.: Carotinoids and fat-soluble A, Science, 1919, 1, 501.

13. Dolly, H., and Guthrie, F.: The origin of the nerve cell pigments, Science, 1919, 1, 190.

14. Palmer, L. S., and Kempster, H. L.: The influence of specific feeds and certain pigments on the color of the egg yolk and body fat of fowls, Jour. Biol. Chem., 1919, xxxix, 299.

15. McCollum, E. V., and Davis, M.: Further observations on the physiological properties of the lipins of the egg yolk, Proc. Soc. Exp. Biol, and Med., 1914, xi, 101.

16. Osborne, and Mendel: Further observations on the influence of natural fats upon growth, Jour. Biol. Chem., 1915, xx, 379. Ophthalmia and Diet, Jour. Amer. Med. Assoc, 1921, lxxvi, 905.

17. Steenbock, Boutwell, and Kent: Fat-soluble vitamine. 1. Jour. Biol.

Chem., 1918, xxxv, 517.

18. Steenbock, and Boutwell: Fat-soluble vitamine. v. Thermostability of the fat-soluble vitamine in plant materials, Jour. Biol. Chem., 1920, xli, 163.

19. Hopkins, F. G.: The effects of heat and aeration upon the fat-soluble vitamine, Biochem. Jour., 1920, xiv, 725.

20. Drummond, and Coward: The effect of heat and oxygen on the nutritive value of butter, Biochem. Jour., 1920, xiv, 734.

21. McCollum, Simmonds, and Pitz: The dietary deficiencies of the maize kernel, Jour. Biol. Chem., 1916-17, xxviii, 153.

22. Steenbock, and Boutwell: Fat-soluble vitamine. vi. The extractability of the fat-soluble vitamine from carrots, alfalfa, and yellow corn by fat solvents, Jour. Biol. Chem., 1920, xlii, 131.

23. McCollum, and Davis: The influence of certain vegetable fats on growth, Jour. Biol. Chem., 1915, xxi, 179.

24. Osborne, and Mendel: The extraction of fat-soluble vitamine from green foods, Proc. Soc. Exp. Biol, and Med., 1918-19, xvi, 98.

25. McCollum, and Davis: Observations on the isolation of the substance in butter fat which exerts a stimulating influence on growth, Jour. Biol. Chem., 1914, xix, 245.

26. Steenbock, H., Sell, M., and Buell, M.: Fat-soluble vitamine. vii.

The fat-soluble vitamine and yellow pigmentation in animal fats with some observations on its stability to saponification, Jour. Biol. Chem., 1921, xlvii, 89.

27. McCollum, and Simmonds: Unpublished data.

28. Wason, I. M.: Ophthalmia associated with a dietary deficiency in fat-soluble vitamine (A): A study of the pathology, Jour. Amer. Med. Assoc, 1921, lxxvi, 908.

29. Cramer, W.: On glandular adipose tissue and its relation to other endocrine organs and to the vitamine problem, Brit. Jour. Exper. Pathol., 1920, 1, 184.