1910.] 



PUBLIC DOCUMENT — No. 31. 



241 



Set Numbers. 



Time of exposure, 

 Length of exposure, . 

 Temperature (degrees), 

 Humidity (degrees), . 

 White Spine, 

 Hotliouse, . 



7.10 

 10 m. 



G5 

 79 



N 

 N 



7.40 

 20 m. 

 CI 



1 t 



N 

 N 



8.15 

 30 m. 

 57 

 S3 

 N 

 N 



9.00 

 45 ni. 

 57 



78 



N 

 N 



10.00 

 Ih. 

 55 

 84 

 SI 

 SI 



9.10 



2h. 



72 



93 



BB 



BB 



Experiment XXVII. 



Cloudy Night Exposures luitli Older Plants, April 16. 

 Fumigation with .015 gram KCN per cubic foot; plants 

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

 hours ; conclusions drawn after one week. 



Experiment XXVIII. 



Cloudy Night Exposures with Plants of Various Ages, April 



25, May 13, 28. 

 Fumigation with .015 gram KCN per cubic foot; dim moon- 

 light during treatment of the first three sets ; conclusions drawn 

 after one week. 



