114 



EFFECTS OF EXPOSING SEEDS 



May 15, 10 A. M. 



A 



1,800,000 X 



1 34.00 mm. 



2 10.00 



3 35-00 



4 20.00 



99.00 mm. 

 24.75 mm. 



221.00 mm. 

 55.25 mm. 



C 



10,000 X 

 86. 00 mm. 

 73.00 

 75.00 

 62.00 



296.00 mm, 

 74.00 mm, 



D 



Ra. Tel. 

 0.00 mm. 

 57.00 

 86.00 

 93.00 



236.00 mm. 

 78.67 mm. 



E 

 Control 

 135.00 mm. 

 1 1 1 .00 

 121.00 

 115.00 



482.00 mm. 

 120.50 mm. 



None of these plants exposed to the radium of 1,800,000 activity 

 are erect, but grow parallel with and close to the surface of the soil. 



10 



11 12 13 



Day of month 



Fig. 13. Effect on the Growth of Zea Mays of Various Durations of Exposure of the 

 Grains, before Planting, to Radium Ravs. Activity, 10,000. 



Exposure for 24 Hours 

 The heights of the seedlings above the surface of the soil are as 

 follows : 



