102. Diagrammatic representation of Indirect and Direct stimulation of tendril 290 103. Record by Method of Balance 291 104. Variation of growth under direct stimulation 292 105. Positive curvature of tendril of _Cucurbita_ 295 106. Diagrammatic representation of effects of Indirect and Direct unilateral stimulation of tendril 296 107. Retardation of rate of growth under cathode 303 108. Acceleration of rate of growth under anode 303 109. Thermonastic and radionastic responses of petal of _Zephyranthes_ 308 110. The Thermonastic Recorder 309 111. Negative thermonastic response of _Nymphæa_ 310 112. Successive positive responses of the terminal leaflet of bean plant 317 113. Positive response and recovery under moderate phototropic stimulation 318 114. Persistent positive curvature under stronger stimulation 318 115. Immediate and after-effect of stimulus of light on growth 320 116. Latent period for photic stimulation 324 117. Effect of a single electric spark on growth 325 118. Responses of _Mimosa_ leaf to light from above 330 119. Responses of _Mimosa_ leaf to light from below 330 120. Record of effect of continuous application of light on upper half of pulvinus of _Mimosa_ 331 121. Positive and negative phototropic response of _Oryza_ 335 122. Leaf of _Desmodium gyrans_ 339 123. The Oscillating Recorder 340 124. Tropic effect of increasing intensity of light on the leaflet of _Desmodium gyrans_ 341 125. Tropic effect of increasing intensity of light on growing organ (_Crinum_) 341 126. The Collimator 342 127. Effect of angle of inclination of light on tropic curvature of pulvinated organ 343 128. Effect of angle of inclination on growth-curvature 343 129. Effect of increasing duration of exposure to light 344 130. Effect of continuous electric and photic stimulation on rate of growth 348 131. Characteristic curve of iron 351 132. Simple characteristic curve of phototropic reaction 351 133. Complete phototropic curve of pulvinated organ 358 134. Complete phototropic curve of growing organ 359