Averrhoa the longitudinal velocity is of the order of 1 mm.

per second.

The record of the transmitted effect of stimulus is found to exhibit a remarkable preliminary variation. This was detected by my delicate recorders, which gave magnifica- tions from fifty to hundred times. I shall give a detailed account of a typical experiment carried out with Averi'hoa carambola, which will bring out clearly the characteristic effects of Indirect Stimulus.

Experiment 47. — Stimulus of electric shock applied at a point on the long petiole of Averrhoa causes successive fall of pairs of leaflets. In the experiment to be described one

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Fig. 52. — Effect of indirect Stimulus on leaflet of Averrhoa carambola. Stimu- lus was applied at the short vertical line. Successive dots at intervals of one second. 'Note the positive response preceding the negative.