8 The Effects of Radio-Active Ores and Residues on Plant Life. 



GERMINATION TESTS 



WITH 



RADIO-ACTIVE ORES AND RESIDUES. 



These tests were carried out with a view to ascertaining what effect, if 

 any, the Ores would have on the growth of seeds in the laboratory under 

 artificial conditions, and the late autumn was chosen as a suitable period, 

 because seeds germinate less satisfactorily at that time than at any other 

 season of the year. 



Red Clover and Smooth-stalked Meadow Grass were selected as repre- 

 sentative subjects, and the tests were systematically and carefully conducted, 

 as the tables on the following pages indicate. 



The results are negative rather than positive, and generally speaking 

 the " controls " have furnished the best records. This is especially the case 

 in Series A (pot trials) and Series B. On the whole it must be conceded that 

 further investigation is essential before arriving at any definite conclusions. 



