1912. 



PUBLIC DOCUMENT — No. 31. 



139 



It is not surprising that the radicles show greater development 

 than the hypocotjls since the former develop first, and for this 

 reason electrical stimulation would show itself more prominently 

 in the radicle than the hypocotyl. Accelerated germination is 



<^^ 



Fig. 2. — Showing the effects of positive and negative electrical charges on the growth of radish 

 seedlings. Average of two experiments. 



shown more prominently in the positively than the negatively 

 charged seeds. The positive charges stimulated both the hypo- 

 cotyl and radicle more than the negative charges, and if the dif- 

 ference in the time of the development of the hypocotyl and 

 radicle is taken into consideration it will be seen that there is 



