INDEX. 



Acid, nitric, for dipping, 109. 



, for dissolving silver, 104. 



Action of Sulphate of Copper upon 

 Iron, 139. 



Adhering of Electrotypes to Moulds, 

 prevention of, 15, 48. 



Advice to Capitalists, by Smee, 69. 



Advantages of Electro-plating, 121. 



Alloy of Zinc and Mercury, 71. 



Alloy of Silver, Copper, and Iron, 108. 



Alloys, Deposition of, 137. 



, Solution for depositing, 137. 



Alkali, preparation of, for removing 

 grease and oil, 95. 



Alkalimeter Test for Cyanide of Po- 

 tassium, 118. 



Amalgamation of Zinc for Batte- 

 ries, 25. 



Experiments upon Economy 



of, 26. 



its advantages, 27. 



how often needful, 51. 



Analysis of Black Matter upon Posi- 

 tive Electrode, 34. 



Anodes, anions of Battery, 23. 



Antimony, deposition of, 136. 



Apparatus, forms of, for Electrotyp- 

 iug, 49. 



Articles prepared for plating, how, 108. 



Arrangements for Plating in Fac- 

 tories, 111. 



Arsenic, deposition of, 136. 



Attraction of Acids for Metals, table 

 of, 91. 



Aurate of Ammonia, 128. 



Batteries, comparative constancy of 

 different kinds, 67. 



comparative cost of, 69. 



produce of, 68. 



relative intensity of 74. 



round, 

 112. 



used for plating, 



Batteries, connected against each 



other, 97. 

 Battery, the first, 2. 



use of separate, 18. 

 description of, 24. 

 Single pair, 24. 

 Babington's, 30. 

 Wollaston's, 31. 

 Daniell's, 36. 

 Grove's, 38. 

 Smee's, 40. 

 Earth, the, 43. 



distance between plates, 27. 



different elements, 28. 



properties of metals fit for, 29. 



modification of Wollaston's, 32. 



common acid, defects of, 33. 



solutions of, how often changed, 



51. 



depositing by separate, 65. 



formed by solution of silver, 117. 



Battery-process for making solu- 

 tions, 105. 

 Bawtree, Mr., 65. 

 Babington's Battery, 30. 

 Best method of making Silver Solu- 

 tion, 105. 



Bismuth, deposition of, 136. 

 Binding-screws, varieties of, 45. 

 Black Lead as a conductor, 17. 

 Black Matter upon positive electrode 



34. 



Black appearance of gold pole, 130. 

 Book Covers electrotyped, 80. 

 Bronze powder used as a conducting 



medium, 17. 



Bronzing, varieties of, 88. 

 Brown, 88. 

 Black, 89. 

 Green, 89. 



Bronze, deposition of, 138. 

 Brugnatelli's experiments on deposi- 

 tion, 2. 



