300 



QUANTITATIVE LAWS IN REGENERATION. I 



of shoots produced by them was 0.61, and the ratio of roots pro- 

 duced was 0.59. The tips of the two sets of leaves dipped in water 

 and roots and shoots developed only in the submerged notches (Fig. 1). 



f IG. 2. Shoot and root formation in whole leaf and in sister leaf (from which 

 the basal part is cut off), both dipping with their apices in water. Duration of 

 experiment 34 days. After nature. 



TABLE III. 

 Duration of Experiment 33 Days. 



