Smithsonian Report, 1920 — Garner and Allard. 



Plate 5. 



1. Maryland Mammoth tobacco in 12-quart buckets exposed to light from 9 a. m. to 4 p. m., or seven 

 hours daily. Seed pods formed when photographed August 19 (compare figure 2). 



2. Maryland Mammoth tobacco in 12-quart buckets left out of doors during the experiment. Flower 

 heads just beginning to show when photographed August 19, 1919 (compare figure 1). 



