JACQUES LOEB 



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piece in the same stem, serving as controls. In other experiments of 

 the same character, pieces containing about 14 nodes were cut out 

 from the stem of the same plant; 2 small pieces at the apex, each con- 

 taining 2 nodes (1 and 2, Fig. 7), and 2 small pieces at the base each 



Fig. 7. Similar experiment as Fig. 6, except that the small pieces have 2 nodes 

 each. Shoots and roots are formed in proportion to mass of stem. Duration of 

 experiment November 16 to December 19, 1921. 



