ELECTROTYPE APPARATUS AND MATERIALS. 



Electrotype Apparatus, consisting of White Glazed Jar, porous Pot, Zinc, and 



Wire, so made that one or more Medals may be taken at a time (fig. 30). 



Size Half-pint, Is. Gd. ; Pint, 2s. Gd. 

 Electrotype Apparatus, a square Mahogany Box, with Tray in corner, porous 



Pot, Zinc, Wires, and Binding Screws for attaching four or more Medals at 



once (fig. 29). 



Size 5 inches square, 6s. 



7 inches square, 10s. 



8 inches square, 14s. 



Electrotype Apparatus (fig. 32), consisting of a narrow square Mahogany Box, 

 cemented water-tight, with a piece of Copper and a Wire, and two Binding 

 Screws, to be used with the Battery (fig. 18). 



Inches square 6 by 4. 7 in. by 6. 8 in. by 7. 



5s. 7s. 8s. 6d. 



Electrotyping Trough, or Secondary Precipitating Cell (fig. 33), adapted for 

 copying a number of Medals, &c. at one operation. 



6 inches by 5. 8 in. by 6& 10 in. by 8. 12 in. by 9. 



7s. 8s. Gd. 10s. Gd. Us. 



Alcalimeter, divided into 100 parts, accurately graduated, for ascertaining the 

 amount of free Cyanide of Potassium in the Silvering Solution (as described 

 at page 118), 7s. Gd. 



Zinc Plates, amalgamated and cut to any size to order, at Is. Gd. per Ib. 

 Platinized Silver, about 2 ounces to the square foot, 10s. per oz. 



%* This can be had in two widths, viz. 4 and 5 inches, and cut to any 



required length. 

 Porous Tubes (Cylindrical) for Daniell's Batteries, &c., best make. 



4 inches by li inches,... 4d. 



5 11 IF ,. 5d. 



7 inches by 2| inches,... 8d. 



8 n 2 " ... 9dL 



6 n If n ...10A 



White Glazed Earthenware Jars, of superior quality (form of fig. 30). 



Capacity 10 oz. ... 4d. each. 

 ir 20 n ... Gd. n 

 n 40 n ... Gd. n 



Capacity 60 oz. ... Is. 2d. each, 

 n 80 "... Is. Gd. 

 120 ... 2s. Gd. 



METALS and MATERIALS for SOLUTIONS, 



Pure Gold, in wire or foil, per grain. 

 Pure Oxide of Gold, per drachm, 9s. 

 Chloride of Gold, 12 grains, in a stoppered bottle, 3s. 

 Pure Silver, for Electroplating, &c., in wire, foil, or sheet, per oz. 9s. 

 Oxide of Silver, per ounce, 9s. 

 Nitrate of Silver, crystallized, per ounce, 5s. 



Gold Solution, for Electro-gilding (Cyanide of Gold and Potassium), per 

 ounce, 7s. Gd. 

 *** Two ounces of this solution, diluted with 18 fluid ounces of water, 



form a pint of solution, containing half an ounce of gold per gallon. 



See page 129. 



