WILLIAM J. ROBBINS 475 



REFERENCES 



1. Beaumont, A. B., Larsinos, G. J., Piekenbrock, P., and Nelson, P. R., 



/. Agr. Res., 43:559 (1931). 



2. Blakeslee, a. F. and Satina, S., Science, 99:331 (1944)- 



3. Bonner, D. M. and Bonner, J., Proc. Nat. Acad. Sci. U. S., 24:70 (1938). 



4. Bonner, J., Plant Physiol, 13:865 (1938). 



5. , A?n. J. Botany, 27:692 (1940). 



6. , Bull. Tor. Bot. Club, 69:130 (1942). 



7. , ibid., 70:184 (1943). 



8. , Am. J. Botany, 36:323 (1949). 



9. , and AxTMAN, G., Proc. Nat. Acad. Sci. U. S., 23:453 (1937). 



10. Bonner, J. and Bonner, H., Vitamins and Hormones (Academic Press, 



1948), p. 225. 



11. Brigham, R. O., Soil Sci., 3:155 (1917)- 



12. Burkholder, P. R. and Nickell, L. G., Botan. Gaz., 110:426 (1949). 



13. Day, D., Science, 94:468 (1941). 



14. de Ropp, R. S., Am. J. Botany (In press). 



15. Funk, C., The Vitamins, translation of 2nd ed. (Williams and Wilkins, 



1922). 



16. Galston, a. W., Am. J. Botany, 35:281 (1948). 



17. Gautheret, R. J., Bull. soc. chim. biol., 24:13 (1942). 



18. , Sixth Grotvth Symposium, 21 (1947). 



19. , Compt. rend. soc. biol., 142:807 (1948). 



20. Hannig, E., Botan. Z., 62:45 (1904). 



21. Hutchinson, H. B. and Miller, N. H. J., Centr. Bakt. Abt. 2, 30:513 



(1911). 



22. HuTNER, S. H. et al, Proc. Soc. Exp. Biol. Med., 70:118 (1949). 



23. KoGL, F. and Haagen-Smit, A. J., Z. Physiol. Chem., 243:209 (1936). 



24. KuLESCHA, Z. and Gautheret, R., Compt. rend. acad. sci., 227:292 (1948), 



25. Lankford, C. E., Abstracts of Papers. Soc. Am. Bact., jfgth General Meeting, 



34 (1949)- 



26. LaRue, C. D., Btdl. Tor. Bot. Club, 63:365 (1936). 



27. Loo, S. W., Am. J. Botany, 32:13 (1945). 



28. , ibid., 33:156 (1946). 



29. , ibid., 33:295 (1946). 



30. LuTZ, M. L., Ann. Sci. Bot., 8:1 (1898). 



31. McClary, J. E., Proc. Nat. Acad. Sci. U. S., 26:581 (1940). 



32. MoLLiARD, M., Bull. soc. bot. France, 57:541 (1910). 



33. Morel, G., Compt. rend. soc. biol., 140:269 (1946). 



34. and Gautheret, R., Rev. sci., 85:649 (1947). 



35. Nielsen, N. and Johansen, G., Compt. rend. lab. Carlsb. ser. Physiol, 



23:139 (1940)- , ^^ 



36. NoBECouRT, P., Btdl soc. botan. Suisse, 56:673 (1946). 



37. NoGGLE, G. R. and Wynd, F. L., Botan. Gaz., 104:455 (1943). 



38. RiKER, A. J., Henry, B., and Duggar, B. U.,J. Agr. Res., 63:395 (i940- 



39. Riker, a. J. and Gutsche, A. E., Am. J. Botany, 35:227 (1948). 



40. RoBBiNS, W. J., Botan. Gaz., ']y-y](^ (1922). 



41. , ibid., 74:59 (1922). 



42. , /. Arnold Arboretum, 27:480 (1946). 



43. , and Bartley, M. A., Science, 85:246 (1937). 



