Viii LIFE MOVEMENTS IN PLANTS 



XLIX.— DAILY MOVEMENT IN PLANTS DUE TO THEKMO- 

 GEOTROPISM. 



I'AGE. 



Cliaracteristics of thenno-geotrcpic movements — Diurnal 

 iiiov'imerit of Palm trees — Diurnal icoveinent of procum- 

 bent stems and of leaves — Continuous diurnal record 

 for successive thermal uoon — Modification of tlie diurnal 

 curve — Effect of fluctuation of temperature — Effect of 

 restricted pliability of the organ — Effect of age — 

 Effect of season — Reversal of the normal rhythm — 

 Effect of constant temperature — Diurnal movement in 

 inverted position ........ 554 



L.— THE AFTER-EFFECT OF LIGHT. 



Electric after-effect of light — After-effect at pre-maximum, 

 maximum, and post-maximum — Tropic lesponse under 

 light, and its after-effects at pre-maximum, maximum, 

 and post-maximum ....... SGi) 



LI.— THE DIURNAL MOVEMENT OF THE LEAF OF MIMOSA. 



Four different phases in the diurnal record of 

 Mimosa — Different factors determining its diurnal move- 

 ment — Diurnal variation of geotropic torsion — Auto- 

 nomous pulsation of tiie leaf of Mimosa — The 

 Photometric Recorder — Effect of direct light — The 

 evening spasmodic fall of the leaf — Diurnal movement 

 of the amputated petiole — Diurnal curve of the petiole 

 of Cassia alata — Hesponse of Mimosa to darkness at 

 different parts of the day — After-effect of light at 

 pre-uiaximutn, maximum, and post-maximum . . 076 



