ART. 4. — M. SHIGA : ON THE EFFECT 



Table III. 



Water-culture of Plsum arvense. 



11 October, 1902. Seeds germinated. 



13 ,, „ Young plants were transferred to water-culture. 



30 January, 1903. End of the experiment. 



(4) Pisum arvense. 



Knop's solution was used. The plants of the first series 

 remained as control. In the second series all the lateral roots, 

 except three, were removed once every week. 



Table IV shows that by a proper removal of roots flowering 

 was promoted. In the second series, the flowering was earlier than 

 in the first series, and moreover the number of flowers was larger. 



Tlie dry weights of the stems in the first series were more 



