THE RHEOTROPISM OF ROOTS 5a 3 
er basin began. The experiment continued for gs 
mperature of 24°, and velocities ranging from 
minute. Twenty-two roots bent positively 
45 to 90°, and four roots remained neutral. 
in the same conditions of temperature and 
m, was kept in the water stream for 84 hours. ee 
a month old and were in flower. : Fifty: roots | doe = 
he current, but not one pete frost a —— : oS 
