PLATE 71 



A. — Maryland Mammoth tobacco in 12-quart buckets exposed to light from 6 a. m. 

 to 6 p. m., or 12 hours daily. Flower heads forming but no open blossoms present 

 when photographed August 19, 191 9. 



B. — Maryland Mammoth tobacco in 12-quart buckets exposed to light from 9 a. m. 

 to 4 p. m., or 7 hotirs daily. Seed pods formed when photographed August 19. 



