1910.] 



PUBLIC DOCUMENT — No. 31, 



245 



Fumigation with .01 gram KCN per cubic foot; plants 

 thirty-seven days oki ; amount of sunlight the day of treat- 

 ment, 4.6 hours; conclusions drawn after one week. 



Experiment XXXVI. 



Cloudy Xight Exposures tvith Electric LlgJit, Stronger Finiil- 



gation. May 2. 



Fumigation with .015 gram KCN" per cnbic foot; plants 

 seven weeks old ; amount of sunlight the day of treatment, 

 S.2 hours ; conclusions drawn after one week. 



Set Numbers. 



3 



Time of exposure, 

 Length of exposure, . 

 Temperature (degrees). 

 Humidity (degrees), . 

 White Spine, 

 Hothouse, . 



8.00 

 10 in. 

 65 

 85 

 N 

 N 



8.25 

 20 m. 

 60 

 72 

 X 

 SB 



9.00 

 30 m. 

 59 

 85 



SB 



SB 



9.45 

 45 m. 

 59 

 83 



SB 



SB 



Experiment XXXVII. 



Cloudy Xight Exposures irith Electric Light, Still Stronger 



Funiigation, May 7. 



Fumigation with .02 gram KCX per cubic foot ; plants 

 seven weeks old ; amount of sunlight the day of treatment, 

 3.1 hours; rather cloudv and with a heavv mist dnrina' the 

 treatment of the first three sets; cloudy during the last two 

 treatments; conclusions drawn after one week. 



