1010.] 



PUBLIC DOCUMENT — No. 31. 



237 



Experiment XIX. 



Starlight Night Exposures with Stronger Fumigation, May 17. 

 Fumigation with .02 gram KCN per cubic foot; plants 

 ten days old; amount of sunlight the day of treatment, 2.3 

 hours; night slightly hazy, with the moon in the first quarter; 

 conclusions drawn after one week. 



Experiment XX. 



Starlight Night Exposures ivith Older Plants, April IS. 



Fumigation with .02 gram KCN per cubic foot ; plants 

 thirty-seven days old ; amount of sunlight the day of treatment, 

 twelve hours; slightly cloudy just at the beginning of the ex- 

 periment; conclusions drawn after one week. 



