CONTENTS. 



PAGE 



1. Facts observed by du Bois-Reymond 277 



2. The Theoretical and Controversial Observations of du Bois-Reymond . 278 



3. Investigation of the intrapolar after-currents of Muscles and Nerves . 284 



4. Investigation of extrapolar after-currents in Nerves and Muscles . . 304 



5. Explanation of the intrapolar and extrapolar after-currents of Nerves and 



Muscles, together with further experiments 310 



6. Concluding Remarks 325 



