The Scope of this Book 

 FURTHER READING 



The history and physiological aspects of hormones particu- 

 larly, and to a less extent, of synthetic growth-substances, 

 have been well reviewed in the following three books : 

 Boysen Jensen, P. (1938), Growth Hormones in Plants, 



translated from the German, and revised, by G. S. 



Avery, Jr. and P. R. Burkholder. McGraw Hill Co., New 



York and London. 2nd edition. 

 Schlenker, G. (1937), Die Wuchsstoffe der Pflanzen. Ein 



Querschnitt durch die Wuchshormonforschung. Leh- 



manns Verlag, Munich. 

 Went, F. W., and Thimann, K. V. (1937), Phytohormones. 



The Macmillan Co., New York. 

 A good short introduction for chemists to some physiological 

 matters such as curvature and the oat test (these are mentioned 

 in the next chapter) is the paper by Fritz Kogl, "On Plant 

 Growth Hormones", in Chemistry and Industry, Vol. 57, 15th 

 January, 1938, pages 49-54. 



A comprehensive review of horticultural aspects of syn- 

 thetic growth-substances has been provided by H. L. Pearse 

 under the title Plant Hormones and their Practical Importance 

 in Horticulture: Imperial Bureau of Horticulture (East 

 Mailing, Kent, England) Technical Communication No. 12 

 (1939) ; 3s. 6d. post free, or from any bookseller. 



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