550 



INDEX. 



Chemical excitation of nerves, Eck- 

 hard's experiments, 143. 



Christian!, on irreciprocal conduction, 

 1 86 ; experiments as to relation be- 

 tween electromotive force of Gymnotus 

 and Torpedo to the electrical resistance 

 of fresh and sea water, 442 ; on elec- 

 trical nerves of Torpedo, 463 ; on elec- 

 trotonus-currents in them, 467. 



Circuit, effects of breaking according to 

 Volta, Ritter, Pfliiger, 116. 



Cold, influence of in producing liability 

 to tetanus in frogs, 136 ; Hering dis- 

 cusses the tetanus produced by section 

 of motor nerves under the influence of 

 cold, 139-142. 



Colladon, on distribution of electricity 

 in Torpedo when discharging, 428 ; 

 currents between dorsal and ventral 

 surfaces of Torpedo called by du Bois- 

 Reymond ' Colladon's currents,' 428. 



Compensation of nerve- or muscle- 

 current, 95. 



Conducting axis schema, Hermann's, 

 described, 311. 



Conduction, experiments as to irreci- 

 procal conduction, 186; conduction in 

 both directions, 537, 538. 



Contraction, Ritter's law of contraction, 

 no; secondary, 147; 'paradoxical,' 

 1 53-i 57. 



Critical time, du Bois-Reymond's ex- 

 planation of, 179 ; Bering's discussion 

 of, 249. 



Crusell, experiment on the effects of vol- 

 taic-current on the tissues, 50. 



Czermak, experiments on excitation of 

 nerve by contact with moist conductor, 



Demarcation -current, discussed by 



Grutzner, 96, 97. 

 Dove's disjunctor, described and criti- 



cised, 492-496. 



Eckhard, experiments on chemical exci- 

 tation of nerves, 143 ; reference to ex- 

 periments on Torpedo, 444. 



Electrical organs, their secondary elec- 

 tromotive phenomena, 211-217 ; effect 

 of boiling on resistance, 214; Bilharz 

 on the structure of, 370 ; organ of 

 Gymnotns, 371, 379 ; of Malapterurus, 

 375; of Torpedo, 433; pseudo-electrical 

 organs of Mormyri and Skate, 388 ; 

 discussion concerning currents in organ 

 of Torpedo, 427-434 ; en secondary 

 electromotive actions of the organ, 445 ; 

 on homodromous and heterodromous 

 currents, 451 ; actions of the organ de- 

 pendent on its vitality, 457 ; experi- 

 mental results, 469-475 ; polarisation 



of organ of Torpedo, 489-492 ; ex- 

 periments on polarisation, 498 ; irre- 

 ciprocal conduction of organ, 503 ; 

 measurements of resistance, 514. 



Electrical nerves, their number in Tor- 

 pedo, Gymnotus, and Malapterurus, 

 379 ; experiments on that of Mala- 

 pterurus, 410; of Torpedo, 462; cur- 

 rent of rest, 463 ; negative variation 

 of current, 466 ; conduction in Torpedo 

 nerves, 537 ; secondary electromotive 

 phenomena of, 539. 



Electricity of electrical fishes, identical 

 with ordinary electricity, 390-397 ; 

 essential identity of electrical phe- 

 nomena in all electrical fishes, 449, 



459- 



Electrolysis by the Torpedo shock, 435. 



Electromotive phenomena, du Bois- 

 Reymond's three classes of, in muscle 

 and nerve, 163 ; arranged later into 

 two classes, 203 ; secondary electromo- 

 tive phenomena investigated by du 

 Bois-Reymond, 170-177 ; in regard to 

 direction of primary current, 181 ; in- 

 vestigation of secondary electromotive 

 phenomena in nerves, 204 ; ditto in 

 electrical nerves of Torpedo, 539 ; ditto 

 in electrical organ, 211; du Bois-Rey- 

 mond's experiments on and theory of 

 electromotive phenomena criticised by 

 Hering, 229, 248 ; Hermann's explana- 

 tion of secondary electromotive phe- 

 nomena, 320 ; du Bois' discussion of, 

 in Torpedo, 458. 



Electro-physics of nerve, Galvani's ex- 

 periment discussed by du Bois-Rey- 

 mond, 140. 



Electro-physiology, Hermann's propo- 

 sitions relating to, 328. 



Electrotonus, Pfluger's doctrine of, 5 ; 

 electrotonus in man, 7 ; Bilharz 1 ex- 

 periments on, 8 ; Nasse's ditto, 8 ; 

 Tigerstedt's method of experimenting, 

 1 6 ; Hermann's theory discussed by 

 du Bois-Reymond, 199 ; du Bois-Rey- 

 mond's doctrine criticised by Hermann, 

 280, 327 ; Pfluger's researches on, re- 

 ferred to, 273 ; verified by Hermann, 

 328 ; electrotonus currents in electrical 

 nerves, 467 ; rate of propagation of, 544. 



Engelmann, theory of break-tetanus, 



7> 74- 



Excitability, changes of, produced by 

 ascending current, 21 ; by descending 

 current, 31 ; physiologically different 

 in different groups of muscles, 1 10 ; 

 conditions of, in nerve near a transverse 

 section, 146. 



Excitation of nerve, propositions relat- 

 ing to, 49 ; du Bois observations on, 

 102 ; Hering's experiments on, 127. 



