CONTENTS. 



ELECTROTYPE PEOCESSES. 



Single-Cell Operations .... 



Preparation of a Coin for Electrotyping 



Forms of Apparatus . 



Comparative Value of different Exciting Solutions 



How often Solutions should be changed and Zinc amalgamated 



Making of Moulds ..... 



Preparation of Wax for Moulds 



To Take Moulds in Wax .... 



Rosin with Wax . . 



Moulds taken in Plaster .... 



Moulds in Fusible Alloy .... 



Moulds in Gutta Percha .... 



Moulds taken from Ferns, Sea- Weed, &c. 



Casting of Reptiles, &c. .... 



Wax Moulds taken from Plaster 



Mould of Plaster from Plaster Models 



Fusible Alloy from Plaster 



Copper Moulds from Plaster .... 



Elastic Moulding , 



Moulding of Figures ..... 



Figures covered with Copper .... 



Preparation of Non-Metallic Moulds for receiving Deposit 

 Use of Metal Moulds ..... 



Precautions on putting the Moulds into the Solution 



Depositing on Large Objects . 



To make Busts and Figures .... 



Coating of Flowers, &c. .... 



Figures from Elastic Moulds .... 



Electrotypes from Daguerreotypes 



Depositing by separate Battery 



Size of Electrodes ..... 



Relative Power of different Batteries . . . 



Constancy of Batteries . . . . 



Comparative Cost of Batteries 



Recovery of Mercury from Waste Zincs 



Compound Cell Process .... 



Effects of Resistance ..... 



Intensity ...... 



Relative Intensity of Batteries 

 Mode of Suspending Objects for Coating 

 Non-Transfer of the Elements of Electrolytes 

 Effects of Difference in Density of Solution . 

 Crystals of Sulphate of Copper upon Electrodes 



MISCELLANEOUS APPLICATIONS OF THE PROCESS OF 



COATING WITH COPPER. 

 Coppered Cloth 

 Calico-Printers' Rollers 

 Etching of Rollers 

 Printing from Electrotypes 

 Glyphography . 



Instructions in Glyphography for the Amateur 

 Copying of Copperplate Engravings 



