146 MISSOURI BOTANICAL GARDEN. 



pounds being either compounds formed by the copper salts with parts of 

 the protoplast, or compounds formed as a result of a stimulus exerted, 

 as evidenced by the presence of large amounts of oxidizing enzymes as 

 a result of an indirect stimulus exerted by the salts sprayed upon the 

 leaf surface. 



BIBLIOGRAPHY.* 



1. Atkinson, G. F. Oedema of the tomato. (Bull. Cornell Agr. 



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2. Dale (Miss) E. Intumescences on Hibiscus vitifolius (L). (Ann. of 



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The papers are referred to in the text by the numbers prefixed to 

 them in this list. 



