Plants as Affected by Insufficient Light. 149 



241. The Electric Light has been found useful as a 

 supplement to the scanty sunlight of short, early-winter 

 days, in forcing certain vegetables 

 and flowers. 



242. Insufficient Pruning Pre- 

 vents the formation of Fruit-Buds 

 in orchard trees by restricting light 

 and thus reducing food formation 

 (58). Compare Fig. 65, which 

 shows a fruit branch of the apple 

 tree grown where exposed to abun- 

 dant sunlight, with Fig. 66, showing 

 one grown in partial shade.* 



243. Blanching of certain vege- 

 tables as celery, endive, cardoon and 

 sea kale is practiced by gardeners to 

 render them more tender and deli- 

 cate. It is effected by excluding the 

 light from the parts desired for use, 

 until the chlorophyll (57) mostly 

 disappears, by banking the plants 



FIG. 65. Fruit branch with earth or inclosing them in paper 



of apple grown in 



*^Sw A^O t h e r or in drain-tile. Very close planting 



grown 'in partial^ SQmetimes prac ticed to promote 



F, fruit-buds; L, 

 lea^-buds. (After blanching. 



FIG. 65. FIG. 66. 



* See Bulletin No. 37, Rhode Island Agricultural Experiment 

 Station. 



