88 EFFECTS OF EXPOSING SEEDS 



May 19, 5 P. M. 



The gardener reported that the seedlings in R broke through the 

 soil before those in C, but he did not have the exact data. 



The radiated culture has four seedlings with the arch of the 

 hypocotyl not yet straighted, while the control culture has only one 

 such seedling. The heights of the hypocotyls above the surface 

 of the soil are as follows : 



Radium 

 25.00 mm. To top of arch. 

 103.00 



Control 



1 14.00 mm. 



99-50 

 112.50 



91.50 

 1 12.00 



30.00 



89. 00 

 1 14.00 



To top of arch. 



762.50 mm. 

 Average length, 95.31 + mm. 



Fig. 4. Experiment 5. Acceleration of Growth of Wheat Following Exposure to 



a Rays from Polonium. 



