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CONTENTS

xix

XIV.—EFFECT OF ELECTRICAL STIMULUS ON GROWTH.

page.

Effect of intensity—Effect of continuous stimulation—Continuity between 'incipient' and actual contraction—Immediate effect and after-effect
•          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •
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XV.—EFFECT OF MECHANICAL STIMULUS ON GROWTH.

Effect of mechanical irritation—Effect of wound
•          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •
 200


XVI.—ACTION OF LIGHT ON GROWING ORGANS.

Method of experiment—Normal effect of light—Determination of the latent period—Effect of intensity of light—Effect of continuous light—Effects of different rays of the spectrum
•          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •
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XVII.—EFFECT OF INDIRECT STIMULUS ON GROWTH.

Mechanical and electrical response to Indirect Stimulus—Variation of growth under Indirect Stimulus—Effects of Direct and Indirect Stimulus
•          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •
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XVIII.—RESPONSE OF GROWING ORGANS IN STATE OF SUB-TONICITY.

Theory of assimilation and dissimilation—Unmasking of positive effect—Modification of response under artificial depression of tonic condition—Positive response in sub-tonic specimen—Abnormal acceleration of growth under stimulus—Continuity between abnormal and normal responses—Positive response to sub-minimal stimulus
•          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •
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