lOO EFFECTS OF EXPOSING SEEDS 



978.50 mm. 

 Average, 97.85 mm. 



Experiment 17 

 May 25, 12 M. 



Ten dry seeds of Lufinus albus were placed in moist sphagnum, 

 with the hilum-edges in contact with a rod coated with RaBrg 

 (25,000 x). Control of ten seeds, similarly placed, but with no 

 radium. 

 May 27, 3 P. M. 



The radicles have protruded from none of the radiated seeds. 



The radicles have protruded from 9 of the control seeds. 



Two of the radiated seeds were poor, and have not absorbed water. 

 May 28, 10 130 A. M. 



The lengths of the radicles are as follows : 



Radiuyn Control 



13.00 mm. 15-00 mm. 



0.00 18.00 



0.00 23.50 



6.50 10.50 



6.50 26.00 



4.50 22.00 



0.00 27.50 



0.00 Injured. 26.50 



26. ICO 



30.50 mm. -" 



A " c I 22. ICO 



Average, 3.01 + mm. ^ 



2 1 8. 00 mm. 

 Average, 21.80 mm. 



