INDEX. 



551 



Extrapolar after-currents, observa- 

 tions by Fick and Hermann, 304. 



Faraday, references to his observations 

 on Gymnotus, 370, 381, 391, 398. 



Fick, on extrapolar after-currents, 304 ; 

 on effects of veratrine on striated 

 muscle, 333, 342. 



Fleischl, on increase of excitability of 

 nerves when treated with weak alkaline 

 solutions, 50 ; on intrapolar polarisation 

 of nerve, 541. 



Fritsch, on origin of organ of ala- 

 pterurus, 488. 



Frog alarum, and Frog interrupter, 

 384 ; use of in experiments on Mala- 

 pterurus, 403, and on Torpedo, 426. 



Griinhagen, experiments confirming 

 Pfluger's doctrine of electrotonus, 1 4 ; 

 on increase of strength of a current 

 passed through a nerve by tetanising 

 the nerve, 210. 



Grutzner, on break-contraction, 60 ; on 

 influence of nerve-current as an auxil- 

 iary cause of break-contraction, 71 ; 

 phenomena of ' hiatus,' 93 ; replies to 

 objections to his theory, 96 ; criticises 

 Hering, 100 ; experiments confirming 

 Tigerstedt's results, 103 ; states condi- 

 tions favourable to break-contractions, 

 107 ; criticism of Hermann, 112 ; dis- 

 cusses conditions of 'incomplete' break- 

 contractions, 119, and Hermann's 

 theory in connection therewith, 123 ; 

 on importance of nerve-current to the 

 excitability of the nerve, 131. 



Gymnotus, Sachs' researches on, 216; 

 the organ of, 371 ; as adapted for experi- 

 ment, 379 ; its electricity identical with 

 ordinary electricity, 391 ; Faraday's 

 experiments on, 420, 435 ; its organ- 

 current, 438, 441 ; discussion of Sachs' 

 results as to polarisation, 448 ; on ho- 

 modromous and heterodromous current, 

 45 7 ; on electromotive behaviour of 

 skin, 482 ; traces of irreciprocal con- 

 duction, 534. 



Head, on the time relation of the exci- 

 tatory process in muscle and nerve, 546. 



Helmholtz, on the rate of propagation of 

 electrotonus, 544. 



Hering, his conclusions as to break-exci- 

 tation similar to Grutzner's, 94 ; experi- 

 ments on excitation of a muscle or a nerve 

 by its own current, 99; on nerve-ex- 

 citation by the nerve-current, 127 ; his 

 method of producing tetanus without 

 metals, 129; on tetanus of motor nerves > 

 under the influence of cold, 138 ; on 

 chemical excitation of nerves, 143; on 



true secondary contraction, 147 ; on 

 du Bois-Keymond's researches on se- 

 condary electromotive phenomena of 

 muscle, 229; influence of tendinous 

 intersections on polarisation of muscle, 

 231 ; experiments on the sartorius of 

 the frog, 241 ; on the positive after- 

 variation of the nerve-current conse- 

 quent on electrical stimulation, 255 ; 

 criticism of du Bois-Reymond's experi- 

 ments on negative variation, 267-273. 



Hermann, experiments as to Pfluger's 

 doctrine of electrotonus criticised by 

 Tigerstedt, 10 ; criticism of his theory 

 of electrotonus, 44 ; on absence of break- 

 excitation when a current exactly com- 

 pensates nerve or muscle-current, 95 ; 

 on excitatory effects of ' like ' current, 

 101 ; his theory of polarisation criticised 

 by du Bois-Reymond, 199 ; on so-called 

 electromotive phenomena in muscle and 

 nerve, 277; criticism of du Bois' views 

 on positive polarisation, 279; theory as 

 to action-current, 286 ; experiments 

 with conducting axis schema, 312 ; ex- 

 periments on Ritter's break- tetanus, 

 322 ; his four propositions to explain 

 phenomena of electro- physiology, 328 ; 

 on intrapolar polarisation of nerve, 541. 



Heterodromous and Homodromous 

 currents defined, 446. 



Hiatus, description of phenomena so 

 called, 93 ; why it is sometimes absent, 

 107. 



Indifference point, verification of Pflu- 

 ger's statement as to the movement of, 

 286, 328. 



Inhibition, experiments on, in Ano- 

 donta, 332 ; in veratrine muscle, 339. 



Intrapolar after-current, Hermann's hy- 

 pothesis in relation to, 284; experi- 

 ments relating to it, 287-301, 310, 322 ; 

 intrapolar polarisation of nerve, 541. 



Irreciprocal conduction, preliminary 

 experiments, 1 86 ; of electrical organ 

 of Torpedo, 503 ; discussion of, and 

 hypothesis of electromotive molecules, 

 525 ; forms a foundation for investi- 

 gation of polarisation phenomena in 

 electrical organs, 535. 



Irreciprocal resistance, discussion of, 

 and experiments relating to, 453. 



Jiirgensen, discovery of the anaphoric 

 actions of the current referred to by 

 du Bois-Reymond, 225. 



Kiihne, observations of the excitation of 

 a nerve by its own current referred to 

 by Hering, 127. 



