244 



EXPERIMENT STATION. 



[Jan. 



Experiment XXXIII. 



Cloudy Night Exposures with Older Plants, April 19. 



Fumigation with .03 gram KCN per cubic foot ; plants 

 tbirtj-eight days old ; amount of sunlight the day of treatment, 

 four hours ; conclusions drawn after one week. 



Experiment XXXIV. 

 Cloudy Night Exposures with Strong Fumigation, March 23. 

 Fumigation with .04 gram KCX per cubic foot ; plants 

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

 hours ; conclusions drawn after two weeks. 



Experiment XXXV. 

 Cloudy Night Exposures with Electric Light, April 29. 

 Conditions in this series of experiments were about like 

 those of the preceding set, except that a 16 candle-pov/er in- 

 candescent bulb hanging near the fumigating box was left 

 turned on during the exposures. 



