vi ELECTRO-PHYSIOLOGY 



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4. EXCITING EFFICIENCY OF ELECTRICAL CURRENTS . . . .155 



5. CLOSING AND OPENING TETANUS THROUGH ELECTRICAL EXCITATION . 165 



i. Conditions of Production by Excitation of Frog's Nerve . . .165 



ii. Excitation of Nerves in Crayfish . . . . . .185 



6. POLAR EXCITATION OF OTHER NERVES AND SPECIFIC NERVE-ENDINGS . 194 



7. POLAR EXCITATION BY CURRENTS OF SHORT DURATION (INDUCTION 



CURRENTS) ........ 207 



8. EFFECT OF REPETITION OF STIMULUS . . . . .215 



9. UNIPOLAR EXCITATION ....... 219 



BIBLIOGRAPHY ........ 223 



CHAPTER X 



ELECTROMOTIVE ACTION IN NERVE . 227 



1. CURRENT OF "RESTING" NERVE ...... 227 



2. ELECTROMOTIVE CHANGES PRODUCED BY ELECTRICAL EXCITATION 



(CURRENT OF ACTION) ....... 242 



3. ELECTROMOTIVE CHANGES PRODUCED BY STIMULATION OTHER THAN 



ELECTRICAL ........ 251 



4. TIME-RELATIONS OF ACTION CURRENT AS DETERMINED BY RHEOTOME . 259 



5. ELECTROMOTIVE CHANGES (ELECTROTONUS) .... 266 



i. In Medullated Nerve ....... 266 



ii. In Non-medullated Nerve . . . . . .281 



iii. In Cooled and Etherised Medullated Nerve .... 286 



iv. In Polarisable Schemata ...... 298 



6. SECONDARY ELECTROMOTIVE CHANGES IN NERVE FOLLOWING THE 



PASSAGE OF A CURRENT ...... 309 



7. THEORETICAL . . . . . . .315 



The Action of Nerve upon Muscle ...... 337 



BIBLIOGRAPHY . . . . . . . 353 



CHAPTER XI 

 ELECTRICAL FISHES . . 357 



1. STRUCTURE AND CONSTITUTION OF ELECTRICAL ORGANS . . . 357 



2. GENERAL ACTION OF DISCHARGE FROM ELECTRICAL FISHES . . 407 



3. DISCHARGE FROM ARTIFICIAL EXCITATION OF THE ELECTRICAL NERVES 



AND CENTRAL ORGANS . 423 



