LIST OF ILLUSTRATIONS. 



PA.OK 



1. DaniellCell 60 



2. Balloon Cell .. .. 61 



3. Callaud Cell .. .. 62 



4. Meidinger Cell .. ... .. 63 



5. BunsenCell .. 64 



6. Leclanche Cell 67 



7. De Lalande and Chaperon Oxide of Copper Cell . . . . 68 



8. Noe"s Thermo-electric Battery 70 



9. Clamond Thermo-electric Battery .. .. .. .. 71 



10. Gramme Bobbin, ordinary size .. .. .. .. .. 74 



11. Gramme Bobbin, large size .. .. .. .. .. 75 



12. Gramme Machine for Electro-deposition .. .. .. 75 



13. Cut-out 76 



14. Siemens Machine .. .. .. .. .. .. 78 



15. Schuckert Machine .. .. .. .. .. .. 79 



16. Mather Machine ., .. .. .. .. .. ..81 



17. Weston Machine .. .. .. .. .. .. .. 82 



18. Elmore Machine .. .. .. .. .. .. .. 84 



19. M. Penlle's Nickeling Works 114 



20. Arrangement of Anodes and Cathodes 123 



21. Nickeling of Small Objects 126 



22. Vat for Nickeling 132 



23. Polishing Lathe . . . . . . . . . . , . 135 



24. Messrs. Neumann, Schwartz, and Weil's Works .. .. 136 



