240 



EXPERIMENT STATION. 



[Jan. 



Time of exposure, 

 Length of exposure, . 

 Temperature (degrees). 

 Humidity (degrees), . 

 Wliite Spine, 

 Ilotliouse, . 



Set Numbers 

 3 



7.05 

 30 ni. 

 69 

 63 

 N 

 K 



7.50 

 45 111. 

 66 



70 

 X 



N 



8.50 

 Ih. 



65 

 CO 



N 

 N 



Experiment XXV. 



Cloudy Night Exposures with Plants of Various Ages, J\Iay 6, 

 Nov. 19, 1907; April 21, 1908. 

 Fumigation with ,01 gram KCN per cubic foot; no sun- 

 light any of the days when treatment was given; conclusions 

 drawn after one week. 



Set Ndmbers. 



Age of plant (days), 

 Time of exjiosure, . 

 Lengtli of exposure. 

 Temperature (degrees), 

 Humidity (degrees), 

 Wliite Spine, . 

 Ilotliouse, 



10 



7.00 

 10 ni. 

 57 

 91 

 X 

 N 



10 



7.25 

 20 m. 

 56 

 89 

 X 

 X 



10 

 8.00 

 30 in. 

 54 

 91 

 X 

 N 



10 



8.45 

 45 ni. 

 56 



88 



X 

 X 



10 



9.45 

 111. 



57 



88 



X 

 X 



33 

 9.10 

 IV^h. 



69 



72 



X 



X 



16 



7.00 



2 1i. 



75 



91 



BB 



BB 



Experiment XXVI. 



Cloudy Night Exposures with Rlronger Fumigation, May 10, 

 1907; April 27, 1908. 

 Fumigation with .015 gram KCN per cubic foot; plants 

 of first five sets, two weeks old ; of sixth set, sixteen days old ; 

 amount of sunlight the day of treat uieut of the first five sets, 

 Y.4 hoiii-s; nut taken for the sixth set; coiu'lnsioiis drawn after 

 one week. 



