1910.] 



PIIRTJC DOCUMENT — No. P.l. 



239 



Experiment XXIIL 



8tar]iglit Night' Exposures with Strong Fumigation, April 22. 

 Fumigation with .04 gram KCN per cubic foot ; plants 

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

 hours ; small amount of moonlight during the first three sets ; 

 moon and stars nearly obscured during the last two sets; con- 

 clusions drawn after one week. 



Experiment XXIV. 

 Cloudy Night Exposures, April 8. 

 Eumigation with .01 gram KCjST per cubic foot; plants 

 two weeks old ; amount of sunlight the day of treatment one- 

 half hour ; conclusions drawn after one week. 



