38 



Resistance to Drought. 



Com that had been soaked, some twelve, and some thirty- 

 six hours, in salt solutions 1-12 for a previous experiment, 

 was used. These were placed in a constant moisture germinator, 

 and when the radicles were from 1 - 10 mm. in length, forty- 

 grains were placed in a drawer of the desk, where they were 

 kept three days. At the end of this time they were thoroughly 

 dry, > T ow they were placed in a saw-dust germinator, where in 

 forty eight hours all had grown well. The plumules ranged in 

 length from 1-30 mm, and the radicles from 1-33 mm. Average 

 length of plumule was 8 mm. while the average for the radicles 

 was 10 mm. 



The average weight per ten grains before soaking was 4 5 

 grams; weight at the time they were taken from the constant 

 moisture germinator was 5.6 grams per ten grains, and the 

 weight per ten grains when taken from saw-dust germinator was 

 7 , 2 grams , 



Twenty of the above were replaced in germinator and grew 

 vigorously but were placed in a drying box at the end of 

 twenty four hours. After drying they did not germinate when 

 replaced in germinator. The other twenty were dried and re- 

 placed in germinator but only two started. 



