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THE RESONANT RECORDER

0.12 seconds. The velocity of transmission of excitation in the particular specimen was thus found to be


Fig. 118. Apparatus for determination of Latent Period and Velocity of Transmission of Excitation in Mimosa.


Fig. 119. Determination of velocity of Transmission of Excitation in petiole of Mimosa.

Two lower records are in response to indirect stimulation applied at a distance of 30 mm.; upper record of response to direct stimulation gives the latent period. Recorder tuned to 10 V per second.