12 



ART. 4. — M. SHIGA : ON THE EFFECT 



(7) Pisum sativum var. arvense. 



I had two series of culture ; Series II served as control. 

 In Series I, lateral roots were removed once every week, for a 

 month, and once every two weeks, during the next month. 



Table VII shows that the flowering was promoted by the 

 removal of lateral roots. 



Table VII. 



Water-culture of Pisum sativum. 



30 December, 1902. Seeds germinated. 



13 January, 1903. Young plants transferred to water-culture. 



25 May. End of the experiment. 



