PLATE 79 



A. — Soybeans growing in four boxes set in the soil and provided with removable 

 covers. To each box different meastired quantities of water were added. In addi- 

 tion to the Peking seen in the farther halves of the boxes, an earlier variety, known 

 as Little Brown, was grown in each box. 



B. — Carrots. Plants in box on left exposed to light from 9 a. m. to 4 p. m. daily. 

 Had made but little growth of top or root when photographed August 19, 19 19. 

 Plants in box on right left out of doors as controls. Had produced much larger tops 

 and roots when photographed. 



