150 Agkicultueal Expekiment Station, Ithaca, K. Y. 



Heview. — These averages are conflicting. The two strains of Snow- 

 ball gave much larger heads in the dark house as shown by the aver- 

 age diameter of the heads. This corresponds with the results obtained 

 a year ago. But the plants — or leaves — were also longer in the dark 

 house, which is opposed to former results. In one instance the plants 

 averaged heavier in the light house, and in the other instance the 

 figures are reversed. With Erfurt decidedly better results were 

 obtained in the light house. The total average of the results shows 

 that in size of head and length of leaves the light and dark houses 

 gave about equal results. It was noticeable, however, that the plants 

 under the light held their leaves more erect than the others. It is 

 probable that under the conditions of this experiment the electric light 

 exercises very little pronounced influence upon cauliflowers. 



2. To v}hat Distance does the Influence of the Light Extend ? The 



Lamp inside the House. 



On the 25th of January, 1893, the curtain partition was removed 

 from the greenhouse, and the electric lamp, without a globe, was hung 

 inside at the extreme end of the house and about three feet above the 

 soil in the cauliflower bed. A large mirror was hung behind it to throw 

 the light down the entire length of the 60 foot rows. The lamp can 

 be seen in the further end of the house in Plate II On the same day, 

 young cauliflower plants were set in this bed, the old crop having been 

 removed and the soil fertilized and thoroughly cultivated. These 

 young plants were some two months old, and were about six inches 

 high when set into the beds. The light ran as follows: 



