THE ROOT aT 
GEOTROPISM 
FIG32. MAIZE-SEEDLINGS. 
CLOCK 
\\ 
APPARATUS -SET-UP 
CLINOSTAT FIGS3 
SHOWING -REGION 
OF -ELONGATION 
BEAN 
PLANTED 
UPSIDE-DOWN 
% 
BEAN-SEEDLING 
MARKED- WITH 
INDIAN -INK 
FIGA5 
