200. Diurnal record of inclined Palm, geotropically curved procumbent stem of _Tropæolum_, and dia-geotropic leaf of Palm 557 201. Diurnal record of leaves of _Dahlia_, _Papya_, and _Croton_ 558 202. Diurnal record of procumbent stem of _Tropæolum_, and leaf of _Dahlia_ for two successive days 560 203. Abolition of the diurnal movement under constant temperature (_Tropæolum_) 565 204. Effect of inversion of plant on diurnal movement of _Tropæolum_ 567 205. Electric response of the leaf stalk of _Bryophyllum_ under light 571 206. Diagrammatic representation of electric after-effect of photic stimulation 571 207. After-effect of pre-maximum photic stimulation 574 208. After-effect of maximum photic stimulation 574 209. After-effect of post-maximum photic stimulation 574 210. Diurnal record of Mimosa in summer and winter 577 211. Record of diurnal variation of torsion in _Mimosa_ leaf 582 212. Continuous record of automatic pulsation of _Mimosa_ leaf 585 213. Photometric record showing variation of intensity of light from morning to evening 586 214. Record of leaf of _Mimosa_ after amputation of sub-petioles 589 215. Diurnal record of _Cassia_ leaf 591 216. Post-maximum after-effect of light on response of leaflet of _Cassia_ 592 217. Effect of periodic alternation of light and darkness on response of _Mimosa_ leaf 594 218. Pre-maximum after-effect of light in _Mimosa_ 595 219. After-effect at maximum 595 220. Post-maximum after-effect exhibiting over-shooting below position of equilibrium 595 PART III. TROPISM IN PLANTS. XXII.--THE BALANCED CRESCOGRAPH _By_ SIR J. C. BOSE.