REPORT OF THE SECRETARY 107 



Growth of Avena coleoptile and first internode in different wave-length 



bands of the visible spectrum. Smithsonian Misc. Coll., vol. 96, No. 6, 



1937. 

 Plant growth in relation to wave-length balance. Smithsonian Misc. Coll., 



vol. 97, No. 2, 1938. 

 Sun rays and plant life. Smithsonian Ann. Rep. 193G, pp. 353-371, 1937. 

 Meier, Florence E. 



Reactions to ultraviolet radiation. Smithsonian Ann. Rep. 1936, pp. 373- 



382, 1937. 



Respectfully submitted. 



C. G. Abbot, Director. 

 The Secretary, 



/Smithsonian Institution. 



