METALS AND THEIR ORES. 



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I mpr oveti sni I 

 No 123.932. 



J. H. RA£. 

 taic Amalgamators for Gold and Silver; 

 Paleitted Feb. 20, 1872. 



9^3. 



In the drawing, the letters A A designate cylinders, each of which is constructed 

 as shown in Figs. 3 and 4 of the drawing. Through the centre of each of these cylin- 

 ders extends a rod, B, the ends of which have their bearings in sockets formed on the 

 interior of the heads of the cylinder, and on this rod are secured the elements of a 

 voltaic pile, C. All the copper elements of this pile are connected by a wire, a, which 

 is in contact with one of the 

 heads of the cylinder, while 

 the zinc elements are con- 

 nected by a wire, d, which is 

 in contact with the opposite 

 head of said cylinder. By 

 this arrangement I obtain a 

 voltaic pile of great power in 

 a comparatively small space ; 

 but it must be remarked that 

 one or more voltaic piles 

 might be arranged in the 

 interior of the cylinder in any 

 desired position, and I do not 

 wish to be confined to the 

 precise arrangement of the 

 voltaic pile which I have 

 shown. Each of the cylin- 

 ders A is provided in one 

 side with a man-hole, through 

 which the cylinder can be 

 charged and discharged, and 

 which can be firmly closed 

 by a man-hole plate 



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Through the side of the cyl- (/laX^a^Hi 

 inder opposite the man-hole 

 extends a pipe, d, which can 

 be opened and closed by a stop-cock, e, and which serves to draw off the quicksilver 

 at the proper time, as will be hereafter more fully explained. From the outer surfaces 

 of the heads of the cylinders project gudgeons, e' , which have their bearings in the 

 edges of a tank, D, which is intended to receive the pulp and conduct it to the agitat- 

 ing-tub E. From the bottom of this tub rises a tube, /, to a level with the top edge, 

 and this tube forms the bearing for a vertical shaft, g, from which extend radiating 

 arms h, carrying the agitators i, which extend down near to the bottom of the tub E, 

 as shown in Fig. i. In the side of this tub are three pipes,/, one above the other, 

 and each provided with a stop-cock ; and from the bottom of the tub, just beneath the 

 pipes /, extends the discharge-pipe k, which leads to the first washer F. An enlarged 



