CONTENTS. 



PAGE 



1. Introduction 369 



2. Living Malapterurus at Berlin. How they may be kept . . . .372 



3. Natural History. Habits of the Malapterurus 374 



4. Mode of experimenting with living Malapterurua 378 



5. Subjective testing of the shock of the Malapterurus . . . -387 



6. Of the direction of the shock in the Malapterurus 388 



7. Physical investigation of the shock of the Malapterurus . . . 390 



8. More detailed investigation of the distribution of tensions in the active 



organ of Malapterurus 397 



9. On the influence of the length of the linings of the leading-off covers upon 



the strength of the branch current in the experimental circuit . . .402 



10. More precise examination of the value of the Frog-interrupter in experi- 



ments on the Malapterurus 403 



11. Of the relative immunity of Malapterurus from electric shocks . . . 404 



12. Experiments on living electrical nerve and organ after separation . . 410 



13. Of the chemical reaction of the electrical organ of the Malapterurus . .412 



