l60 EXPOSED WATER AND FRESHLY FALLEN RAIN 



control culture 25.00 mm. Thus, in the case of the lupines, no 

 appreciable effect resulted from the treatment. 



Oat {Avena) 

 On April 14 five seedlings of the 1,500,000 culture were just up, 

 six seedlings of the 10,000 culture, and eight seedlings of the control. 



April 16. 



The following measurements of height were recorded : 



On April 17 the averages were, for the 1,500,000 culture, 45.34 

 mm. ; for the 10,000 culture 35.80 mm. ; and for the control 47.41 

 mm. On April 21, the average heights were, respectively, 77.10 

 mm. ; 66.20 mm. ; and 71.37 mm., on April 23, 97.60 mm. ; 80.30 

 mm.; and 87.80 mm., and on June 4, 311.70 mm.; 290.70 mm.; 

 and 283.88 mm. Thus the initial slight retardation is replaced by 

 an acceleration. Experiment closed. 



In the bean culture, from a comparison of the measurements, it 

 is seen that soaking the seeds in the water exposed to the radium 

 rays was followed by a much less rapid growth than the normal, but 

 the difference between the 10,000 x and the 1,500,000 x cultures is 

 negligible. At the end of six weeks there was no apparent difference 

 in the height and vigor of the plants in the three cultures. 



