1010.1 



PliRLTC DOCUMENT — No. 31. 



219 



In this experiment it wonkl seem that plants which had been 

 shaded for a time before the treatment, by being placed under 

 the benches, were at a slight advantage. 



Experiment VI. 

 Night Exiwsurcs, Decemher IJ/. 

 Fumigation with .01 gram KCN per cubic foot; plants six 

 weeks old; house humidity, 79° ; five hours of sunlight the day 

 of treatment ; dark during treatment of first two sets, moon- 

 light during the last three ; treatment began on set 1 as soon as 

 it was really dark; plants watered at 8.30 A.:\r., dry when 

 treated ; half the plants of each variety had been placed under 

 the bench for twenty-four hours before treatment; conclusions 

 drawn three weeks after the treatment. 



