Scientific Results 



physiological interest have also been omitted. For the earlier 



references consult Boysen Jensen's book. 



Cooper, W. C. (1935), Plant Physiol., 10, 789; (1936), ibid.y 



11, 779- 

 Hitchcock, A. E. (1935), Indole-3-n-propionic acid as a 



growth hormone and the quantitative measurement of 



plant response. Contrib. Boyce Thompson Inst., 7, 87; 



see also ibid., p. 349. 



Hitchcock, A. E., and Zimmerman, P. W. (1935). Absorption 

 and movement of synthetic growth substances from soil 

 as indicated by the responses of aerial parts. Contrib. 

 Boyce Thompson Inst., 7, 447. 



Hitchcock, A. E., and Zimmerman, P. W. (1936). Effects 

 of growth substances on the rooting responses of cut- 

 tings. Contrib. Boyce Thompson Inst., 8, 63. 



Jackson, T. H. (1938). Nature, 14, 835. 



Laibach, F. (1935). Uber die Auslosung von Kallus- und 

 Wurzelbildung durch (3-Indolylessigsaure. Ber. Deut. 

 bot. GeselL, 53, 359; see also ibid., p. 469. 



Moore, J. A. (1933). Missouri Bot. Garden Bulletin, 21, 139. 



Pearse, H. L. (1936-7). Journ. Pomol. Hort., 14, 365. 



Templeman, W. G. (1938). Emp. Journ. Exp. Agric, 7, 76. 



Went, F. W. (1934). Versl. K. Akad. Wetensch., Amsterdam, 

 37, 445. 



Zimmerman, P. W., Hitchcock, A. E., and Wilcoxon, Frank 

 (1936). Several esters as plant hormones. Contrib. Boyce 

 Thompson Inst., 8, 105. 



Zimmerman, P. W., and Wilcoxon, Frank (1935). Several 

 chemical growth-substances which cause initiation of 

 roots and other responses in plants. Contrib. Boyce 

 Thompson Inst., 7, 209. 



REFERENCES B 



Afanasiev, M. (1939). Journ. Forestry, 37, 37. 

 Amlong, H. U. (1938). Ber. Deut. bot. Gesell, 56, 239. 

 Curtis, O. F. (19 1 8). Stimulations of root growth in cuttings 



by treatment with chemical compounds. Cornell Agric. 



Expt. Sta. Mem., No. 14, 69-138. 



35 



