316 MACDOUGAL AND SPOEHR— GROWTH AND IMBIBITION. 



The increments measured are of course inclusive of the elonga- 

 tion of the base of the leaf and of the internode from which it 

 arises, as well as of any residual action of internodes below, con- 

 sequently a figure illustrative of the grand period of growth of a 

 single member could not be plotted from the data given. (Meas- 

 urements showing a beginning of decreasing rate are given in bold- 

 faced type.) 



Variations in Length of Leaf of "Altar Corn" (Zea). 

 1914 



