The average increase in germination of the heavy seeds as shown 

 by the water separation method was 6i'/f. In these experiments the 

 seeds were placed in a funnel filled with water, and after shaking 

 and letting them stand for a few moments the seeds which had sunk 

 were drawn off and equal numbers of each series selected and 

 planted. The difference in the weight of onion seedlings grown 

 from heavy and light seed which had been separated by water is 

 shown in table II, there being a gain of ^•j.42^. In table III the 



