Page:Collected Physical Papers.djvu/14

page to electric radiation—Characteristic cyclic curve of a self-recovering receiver—Curve showing variation of resistance with increasing E. M. F.—Characteristic cyclic curve of negative substance, potassium •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •

223

(Brit. Asso. Glasgow, 1901.)

XVIII

ON THE SIMILARITY OF EFFECT OF ELECTRICAL STIMULUS ON INORGANIC AND LIVING SUBSTANCES

Response of Fe3O4 receiver to a single stimulus—Superposition of stimuli—Effects of slow and rapid intermittence of stimulation—Opposite effects of feeble and strong stimulations—Effect of variation of temperature on response of inorganic receiver and of muscle—Effects of stimulants, depressants and poisons •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •

253

(Congress of Science, Paris, 1900.)

XIX

THE RESPONSE OF INORGANIC MATTER TO MECHANICAL AND ELECTRICAL STIMULUS

Characteristics of response of a muscle—Mechanical Lever Recorder—Electric Response of living substances—Electric response of plants—Universal applicability of the test of electrical response—Inorganic response—Effect of superposition of stimuli—Fatigue of response in tin—Effect of stimulus of light on metals—An artificial retina—Binocular alternation of vision—Effects of stimulants and depressants on response of metals—Response of inorganic matter "killed" by poisons •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •

259

(Friday Evening Discourse, Roy. Inst. 1901.)

XX

ELECTROMOTIVE WAVE ACCOMPANYING MECHANICAL DISTURBANCE IN METALS IN CONTACT WITH ELECTROLYTE

Electromotive Wave concomitant with molecular disturbance—Method of Block—Recording apparatus—Experiments demonstrating balancing effect—Comparison of electric excitability of two points—The Electric Comparator—Response by method of relative depression or exaltation—Detection of traces of physico-chemical change—Interference effects—The cell form of apparatus—Response dependent on molecular condition—Effects of annealing and of previous vibration—Transformation of abnormal to normal response after continuous stimulation—Response under increased intensity of stimulus—Effect of sub-minimal stimulus—Maximum effect—Chemical excitants and depressants—Opposite effects of strong and feeble dose—Effect of "poisons" in abolition of response •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •          •

277

(Proc. Roy. Soc. May 1902.)