1910.] 



PUBLIC' 1 )( )('lLMh:NT — No. 81 



231 



Time of exposure, 

 Length of exposure, . 

 Temperature (degrees). 

 Humidity (degrees), 

 White Spine, 

 Hothouse, . 



Set Numbers. 



8.30 

 10 ni. 



69 

 91 



N 

 N 



2 



8.55 

 20 m. 

 67 

 81 

 N 

 N 



9.. 30 

 30 m. 

 67 

 81 



SB 



SB 



10.10 



45 m. 



76 



83 



K 



K 



EXPEEIMENT VII. 



Cloudy Day Exposures with Older Plants, May 8. 

 Fumigation with .02 gram KCj^ per cubic foot ; plants 

 forty-seven days old ; amonnt of sunlight the day of treatment, 

 eight hours; plants watered the day before treatment; conclu- 

 sions drawn after one week. 



Experiment VIII. 



Moonlight Sight Exposures, March 20. 



Fumigation with .01 gram KCIsr per cubic foot ; plants 

 eight days old; amount of sunlight the day of treatment, nine 

 and a half hours ; conclusions drawn after one week. 



