xxvi Contents 



NOTES BY THE EDITOR ... P. 352 

 [JAMES CLERK MAXWELL, 1879] 



NOTE PAGE 



1 . On the theory of the electric fluid 352 



2. Distribution of hypothetical fluids in spheres, &c 358 



3. Canals of incompressible fluid .......... 365 



4. Charges of two parallel disks close together 368 



5. Zero of potential ............ 369 



6. Molecular constitution of air 370 



7. Idea of potential 372 



8. Cases of Attraction and Repulsion 373 



9. Escape of electricity into the air .......... 374 



10. Electromotive force required to produce a spark . 375 



n. Two circular disks far apart on the same axis .... . 377 



12. Capacity of a long narrow cylinder ......... 382 



13. Two influencing cylinders 388 



14. Condensers with curved plates 389 



15. Glass as a dielectric ............ 3^9 



16. Mutual influence of condensers 39 2 



17. General theory of the experiment with trial plates 394 



18. On the "Thoughts concerning Electricity" 397 



Early form of Cavendish's Theory of Electricity 398 



19. Experiment on the charge of a globe between two hemispheres .... 404 



20. Capacity of a disk of sensible thickness 409 



21. Capacity of two circles on same axis 411 



22. Capacity of a square . . . . . . . . . . . 4 12 



23. Charge of the middle one of three parallel plates 413 



24. Capacity as affected by walls of the room .415 



25. Tin cylinder and wires, compared with theory 416 



26. Influence of different temperatures on glass 416 



27. Comparison of measurements of dielectric capacity . . . . . .418 



28. Computed charge of cylindrical condenser 4'8 



29. On Electrical Fishes 49 



30. Excess of redundant fluid on positive side above deficient fluid on negative side . 423 



31. Intensity of shocks 4 2 3 



32. Iron wire and salt water compared as regards conductance 429 



33. Salt and fresh water 4 2 9 



34. Other saline solutions 43 



35. Globe and disk compared as regards capacity 433 



LIFE OF CAVENDISH, BY THOMAS YOUNG . P . 435 



INDEX TO CAVENDISH MANUSCRIPTS . P . 449 



