1910.] 



PUBLIC DOCUMENT —No. 31. 



243 



EXPEEIMENT XXXI. 



Cloudij Night Exposures witli Siill Older Plants, May 9, 13. 

 Fumigation with .02 gram KCN per cubic foot; plants 

 of the first five sets, fiftj-one days old ; of sixth set, thirty-eight 

 days old ; conclusions drawn after one week. 



EXPEEIMENT XXXII. 



Cloudy Night Exposures with Stronger Fumigation, May 27. 



Fnmigation with .03 gram KCN per cubic foot; plants 

 twenty days old ; no sunlight the day of treatment ; conclu- 

 sions drawn after one week. 



