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ILLUSTRATIONS

xxiii

figure.

page.

48.
Diagram of experimental arrangement for variation of conductivity of animal nerve
                                                                                                                                                                                                                                                                              
126
49.
Effect of heterodromous and homodromous current in inducing variation of conductivity in nerve
                                                                                                                                                                                                                                                                              
127
50.
Record of ineffectively transmitted salt-tetanus becoming effective under heterodromous current
                                                                                                                                                                                                                                                                              
129
51.
Direct and after-effect of homodromous current
                                                                                                                                                                                                                                                                              
131
52.
Effect of indirect electric stimulus on the responding leaflet of Averrhoa
                                                                                                                                                                                                                                                                              
136
53.
Staircase responses of sub-tonic specimen of Mimosa to electric shock
                                                                                                                                                                                                                                                                              
145
54.
Staircase responses of sub-tonic specimen of Mimosa to light
                                                                                                                                                                                                                                                                              
147
55.
Positive, diphasic, and negative responses of extremely sub-tonic specimen of Mimosa to successive light stimuli
                                                                                                                                                                                                                                                                              
147
56.
The compound Lever
                                                                                                                                                                                                                                                                              
154
57.
The crank arrangement for oscillation
                                                                                                                                                                                                                                                                              
156
58.
Photograph of the High Magnification Crescograph
                                                                                                                                                                                                                                                                              
157
59.
Crescographic record of absolute rate of growth of Kysoor, and of effects of cold and warmth on stationary and moving plates
                                                                                                                                                                                                                                                                              
161
60.
Record of physical change
                                                                                                                                                                                                                                                                              
165
61.
Records of latent period and time relations of growth response
                                                                                                                                                                                                                                                                              
166
62.
Record of a single growth-pulse of Zephyranthes
                                                                                                                                                                                                                                                                              
167
63.
Records of growth-rate at different temperatures
                                                                                                                                                                                                                                                                              
175
64.
Continuous record of growth, showing temperature minimum
                                                                                                                                                                                                                                                                              
178
65.
Continuous record of growth, showing temperature maximum
                                                                                                                                                                                                                                                                              
66.
The Thermo-Crescent Curve
                                                                                                                                                                                                                                                                              
180
67.
Curve showing the relation between growth and temperature
                                                                                                                                                                                                                                                                              
181
68.
Effects of H2O2, NH3, and ether on growth
                                                                                                                                                                                                                                                                              
184
69.
Effect of CO2 on growth
                                                                                                                                                                                                                                                                              
185
70.
Effect of irrigation on growth
                                                                                                                                                                                                                                                                              
189
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