-21- 



germinated after about 110 hoiirs.) The differences in the 

 ntunber of seedlings produced from the 25 seeds \iere appar- 

 ently largely due to internal differences in the seeds 

 themselves. At any rate, the individual variation among 

 the several groups of 25 seeds xms apparently greater than 

 any possible differences in viability that may have been 

 related to salt proportions or temperature; if there v/ere 

 any stxch differences they were masked by individual 

 variation. VJitli these points in mind, v;e may dismiss the 

 topic of percentage of germination as a characteristic of 

 these seeds that was not appreciably influenced by either 

 the kind of solution used, or the temperature eraployedo 

 In this connection, it may be mentioned that all the solu- 

 tions used v;ere relatively very dilute so that there could 

 have been no significant influence exerted in the osmotic 

 way. 



Tnxning to the mean hourly rates of shoot 

 elongation for the entire culture period, as illustrated 



by the data of table I, the first test of these solutions 



o 

 v/lth a temperature of 31 C. gave an average rate of .64 ram. 



and the second test gave an average rate of .70 mm. In the 



first test, the mean rates ranged from 28 per cent below 



the average (relative rate,. 72 ), to 11 per cent above it 



(relative rate, 1.11), thus showing a total range of 39 per 



cent of the average. The solutions that gave mean rates 



above the average in this first test might be accounted as 



