SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 87, NO. 14, PL. 3 



^3ip|r 



5 6 



Appearance of the Six Groups of Tomato Plants After 

 Weeks of Growth 



Low light intensity: 



X'isible plus near infra-red i 



X'isible only -2 



Ili^;h light intensity; 



\ isihle plus near infra-red 4 



Visible only 3 



Natural illiiniiiiation : 



In west window of tower 5 



In north window of laboratory 6 



