194 GREENHOUSE MANAGEMENT. 



the Grand Rapids and similar sorts are laid on their 

 sides with the butts overlapping. Ventilate in warm 

 weather, and line the barrels with newspapers in winter. 

 Cover the top of the barrel with burlap. 



As indicated on a previous page, the Grand Rapids 

 is one of the best varieties for forcing purposes, while 

 Boston Market, Hot House and Belmont are the best of 

 the cabbage varieties. 



ELECTRO CULTURE OF LETTUCE. 



Some eight or ten years ago Mr. W. W. Rawson of 

 Arlington, Mass., noticed that lettuce seemed to be ben- 

 efited by the light from the electric street lamps, and 

 to test its efficacy he placed a 2000 candle power arc 

 lamp over one house, and ten 30 candle power lamps 

 inside another house, with the effect of hastening the 

 maturity of the crop fully five days, which would make 

 a saving of fifteen days for three crops. Mr. Rawson is 

 so convinced of the value of the electric light that he 

 now has three 2000 candle power lights over one of his 

 houses, and finds himself repaid three-fold by the effect 

 on the crop. 



These results induced Prof. Bailey to make various 

 tests at the. Cornell Experiment Station of the efficacy 

 of the electric light upon the growth of different plants. 

 After several years' trial, he finds decidedly beneficial 

 effects from the electric light upon large lettuce plants, 

 and that the maturity of the crop may be hastened at 

 least one week. The lights were not run more than five 

 hours a night. The results obtained by Prof. Bailey 

 agree quite closely with the conclusions of various French 

 investigators. It was found that naked lights inside the 

 house injured most plants, but when opal globes were 

 used the effect was quite beneficial in the case of let- 

 tuce. When the light enclosed in an opal globe was 

 hung outside, about six feet above the glass, the best 



