xvi
RESEARCHES ON IRRITABILITY OF PLANTS
versa—Multiple response induced in Biophytum by the passage of constant current—Comparison of sensitiveness of plant and animal—Minimum current for excitation of human tongue—Relatively higher sensitiveness of Biophytum • • • • • • • • • • • • • • • • • • • • • • • • • • • • |
244 |
POLAR EFFECTS UNDER STRONG CURRENTS
Abnormal polar reactions in Protozoa—Transformation of polar reaction in leaf of Mimosa from Type II. to Type III. under strong current—Further transformation to Type IV. under stronger current—Exhibition of Type III. and Type IV. by leaflets of Mimosa, Biophytum, Averrhoa carambola—Law of polar action of strong currents • • • • • • • • • • • • • • • • • • • • • • • • • • • • |
253 |
VARIATION OF POLAR REACTION UNDER TISSUE MODIFICATION
Modification of polar reaction under tissue-changes—Effect of age—After-effect of moderate stimulation—Modified polar effect; excitation at kathode-make and anode-make; excitation at kathode-make, kathode-break, and anode-make—General review of polar reactions • • • • • • • • • • • • • • • • • • • • • • • • • • • • |
266 |
MULTIPLE AND AUTOMATIC RESPONSE
The Oscillating Recorder—Latent period of Biophytum—Refractory period—Response on 'all-or-none' principle—Multiple electrical response to a single strong stimulus—Multiple mechanical response to strong stimulus in Biophytum and Averrhoa—Continuity of multiple and automatic response—Ordinarily responding Biophytum converted into automatically responding condition by excess of stored energy—Automatically responding Desmodium converted to ordinarily responding condition by depletion of stored energy • • • • • • • • • • • • • • • • • • • • • • • • • • • • |
278 |
THE AUTOMATIC PULSATIONS OF DESMODIUM GYRANS
Activity of detached leaflet of Desmodium—Pulsation maintained uniform under constant internal hydrostatic pressure—The plant-chamber—Time-relations of pulsating movement derived |
