282 
AMERICAN JOURNAL OF BOTANY 
[Vol. 9, 
tion of oxygen by Strongylocentrotus purpuratus, but that this is not suffi- 
cient to account for the narcotic effect on the basis of decrease of oxygen 
consumption (though a decrease of about sixteen percent of the normal is 
brought about). They point out that this is in disagreement with Ver- 
worn's theory. The experiments of the writers are in harmony with this 
conclusion. 
SUMMARY 
Ethyl alcohol decreases the production of carbon dioxide by radish 
seedlings and at the same time brings about the formation of organic acids. 
Laboratory of Plant Physiology, 
Harvard University 
