8
LIFE MOVEMENTS IN PLANTS
the movement of the palm tree, a reducing device is employed to keep the record within the plate. A lever, R¹, records the movement of the attached tree or plant on a moving plate of smoked glass. The plate is not in contact with the
Fig. 2. Apparatus for automatic record of movement of trees and plants; T, differential metallic thermometer; R, recording lever for temperature; R¹, for recording plant movement; C, clock-work for oscillation of recording plate. The same clock-work moves plate laterally in 24 hours.
tip of the recording lever, but separated from it by a distance of about 3 mm. A special oscillating device, actuated
