64 



EXPERIMENT STATION. 



[Jail. 



Table I. — Showing Effects of Different Light Intensities on the Growth 

 of Cucumber Plants and their Susceptibility to Burning by Fumigation 

 with Hydrocyanic Add Gas. 



Experiment I. — • Duration, May 2 to June 6. 

 [Measure.nents in centimeters.] 



NUMBEK. 



5 N. 



Relative light intensity (per cent.), 

 Average height of plants, . 

 Average diameter of stem, 

 Average length of internodes, 



Leaf: — 

 Average length, . 

 Average width, . 

 Length by width. 



2t 4 



13 



.4 



5 



7 5 

 6.5 



48.7 



26.60 



20.10 



57 



5.90 



8.60 



9. CO 



77.10 



48.10 



11.00 



.45 



4.20 



5.20 



6.20 



32.20 



74.00 

 17 00 



.65 

 4 00 



9 90 



9.20 



91 00 



100 

 16. 



3.7 



8.7 

 10.5 

 91.3 



Note. — No. 1, all leaves killed; No. 2, leaves burned, few killed; Nos. 3, 4 and 5 N, traces 

 of burning. 



Experiment II. — Duration, May 8 to June 13, 1911. 

 lMe.i.surements in centimeters.] 



Note. — No. 1, burned; some leaves killed; Nos. 2 and 3, some burning; Nos. 4 and 5 N 

 slight burning. 



Experiment III. — -Duration, May 22 to June 24, 1911. 

 [Measurements in centimeters.] 



Note. — No. 1, burned; No. 2, burned; No. 3, slight burning; No.s. 4 and 5 N, no burning. 



