238 



EXPERIMENT STATION. 



[Jan. 



Set Numbers. 



Time of exposure, 

 Length of exposure, . 

 Temperature (degrees), 

 Humidity (degreet), 

 Wliite Spine, 

 Hothouse, . 



7.00 

 20 m. 

 65 

 71 

 N 

 SB 



8.25 

 30 m. 

 63 

 71 

 N 

 SB 



9.10 

 45 ni. 

 63 



80 



N 



.SB 



10.10 

 Ih. 

 65 

 76 

 SB 

 N 



ExPEEIMENT XXL 



Starlight Kiglit Exposures with Stronger Fumigation, May 



20, June 4. 

 Fumigation with .03 gram KCX jDer cubic foot ; plants 

 of first three sets, three weeks old, treated May 20 ; of last 

 two sets, twenty-six days old, treated June 4; amount of sun- 

 liglit May 20, 10 hours; June 4, 6.6 hours; small amount of 

 moonlight during sets 1 and 4; conclusions drawn after one 

 week. 



Experiment XXIL 



Starlight Night Exposures with Older Plants, May 2S. 



Fumigation with .03 gram IvCX per cubic foot; plants 

 tliirty-lwo days old; nmoiiiit of sunlight the day of treatment, 

 3.8 hours; conclusions drawn after one week. 



