1910.] 



PUBLIC DOCUMENT — No. 31. 



239 



ExPEKIMEJ\TT XXIII. 



StarligJit Night Exposures with Strong Fumigation, April 22. 

 Fnniigation with .04 gram KCN per cubic foot ; plants 

 five weeks old ; amount of snnliglit the day of treatment, 11.5 

 hours; small amonnt of moonlight dnring the first three sets; 

 moon and stars nearly obscnred dnring the last two sets ; con- 

 elusions drawn after one week. 



Experiment XXIV. 



Cloudy Night Exposures, April 8. 

 Fumigation with .01 gram KCN per cubic foot; plants 

 two weeks old ; amonnt of sunlight the day of treatment one- 

 half hour; conclusions drawn after one week. 



