PLATE 69 



A. — Biloxi soybeans. Plants in box on right exposed to light from daylight to 10 

 a. m. and from 2 p. m. to dark, a total of 9 to 10 hours dail)'. Plants in box on left 

 exposed to light from 6 a. m. to 6 p. m., or 12 hours daily. Note marked difference in 

 effectiveness of the two expostires in hastening fruiting and maturation. Photographed 

 September 8, 1919. 



B. — Radish plant in which the seed stalk was transformed into a vegetative shoot 

 through the influence of the decreasing length of day. Photographed October 12. 



