Measurement of Geotropic Sensitivity of Seedlings.
By a new method of applying small centrifugal forces, produced by vibration of wires which hold corn seedlings on a horizontal clinostat, threshold values of the required gravitational force have been obtained. In darkness the centrifugal acceleration need be only about 0.04 cm/sec(2), while in weak light it must be 10 times as great.
Lyon
C J
CJ