xii
RESEARCHES ON IRRITABILITY OF PLANTS
TIME-RELATIONS OF THE RESPONSIVE MOVEMENT AND STANDARDISATION OF STIMULUS
page
Latent period of Mimosa—Apex time—Rate of responsive movement of leaf—Effect of intensity of stimulus, fatigue, and temperature—Periodic dot marker—Time relations of response and recovery—Effect of season—Response of Biophytum—Response of Neptunia—Arbitrary distinction between sensitive and ordinary plants—Differential response in Mimosa—Response of ordinary plants—Universal sensitiveness of plants—Standardisation of stimulus—Maximal and Minimal Stimuli—Extreme sensitiveness of Mimosa |
35 |
THE ADDITIVE EFFECT; INFLUENCE OF LOAD, TEMPERATURE, AND INTENSITY OF STIMULUS
Greater excitatory efficiency of the break-shock—Additive effect of stimulus—Quantitative relation of additive effect—Effect of load—Thermal chamber—Effect of temperature—Effect of increasing intensity of stimulus on response |
52 |
VARIOUS TYPES OF RESPONSE
Necessity of uniform stimulation—The Periodic Starter—The Automatic Exciter—Electrolytic contact-maker—The complete Response-recorder—The factor of tonicity—Uniform
responses—Fatigue under shortened period of rest—Growing fatigue—Alternating fatigue—Staircase response—Explanation of erection of leaf under continuous stimulation—Fatigue-relaxation in plant and animal—Response under single stimulus and under tetanisation |
64 |
EFFECTS OF DIFFERENT GASES ON EXCITABILITY OF MIMOSA
Induced change of excitability under sudden variation of light—Abolition of excitability by absorption of water—Restoration of excitability by application of glycerine—Stimulating, |
