122 



REGENERATION 



When the reverse experiment is made, namely an investigation 

 of the influence of a basal leaf on shoot formation at the apex, 

 no such diminution with the distance of the apex from the leaf is 

 observed; possibly, perhaps, the contrary occurs; namely, that 

 the mass of shoot formation at the apex increases with the dis- 

 tance of the apex from the basal leaf. Such experiments are 



I Fig. 98.— Half stem with leaf in middle. Oct. 15 to Nov. 7, 1923. 



illustrated in Figs. 97 to 99. The stems were split longitudinally 

 with the exception of the region near one node at which a leaf 

 was left. This node was in turn the fourth (Fig. 97), the second 

 (Fig. 98), and the apical (Fig. 99), thus corresponding to the 

 preceding experiment. The results are expressed in Table XXIV. 

 The dry weight of the stems was in succession, 3.209, 2.610, 

 and 2.897 grams. The duration of the experiment was 23 days. 



