J.D. Wheipley on treatment of Gold and other metals, 408 
_ The brick floor or sole of the furnace was abandoned, and a 
water-floor substituted. Over one end of this pool or water- 
h, a perpendicular flue was erected, from 12 to 15 feet in 
height above the surface of the water. 
The flames of four fires were poured into the top of this flue 
> effect of two fan-wheels: the first, the copper spray-wheel 
uready spoken of ;.the other, an auxiliary fan blower, sending 
air into all the fire-boxes, The top of the furnace was left open, 
and a column of air, bearing pulverized ore, driven directly from 
the pulverizing mills, down through the centre of the perpen- 
dicular flue. 
The operation of this machinery balanced and regulated the 
force of the draft so well, that while ore-dust was driven in at 
the rate of 1200 pounds an hour, carrying with it an excess of 
atmospheric air, if a side door of the descending flue were 
epened, a feather would float in the opening without being 
wn either way, 
e then discovered that the immediate quenching of the fused 
particles of ore, by the water in the pool and in the chamber be- 
ond, was essential to a thorough separation of the metals. The 
ted particles on touching the surface of the water are explo- 
ded into still minuter fragments, a degree of fineness unattain- 
le by any other means. The entire apparatus is constructed 
With a view to this result, oe 
The water lining the bottom of the flues is a circulation com- 
éted by an outside canal. The water thrown up from, the 
Copper dash wheel, returning circuitously, falls back into the 
Tace pool. This water, after some time working of the fur- 
hace, is Of course charged with sulphates of iron, copper, and 
other metals. The insoluble metal falls to the bottom with the 
“iment, which is composed chiefly of silica and iron. In this 
et the gold will be found ready for washing and amalga- 
n 
The sediment is drawn out by the workmen, as fast as it accu- 
mulates, through the submerged arches on which the brick flues 
®t water chambers are established. 
_The condition of the sediment is that of a smooth plasma 
Without grit or coarseness of grain. Using only floating dust, 
10 tons can be worked in ten hours with these results, in a fur- 
hace of the size indicated. More extensive machinery would 
Sve larger returns, 
We built our flues and water beds under the furnace and also 
Under the horizontal brick archway leading therefrom to the 
sPfay-wheel, of common brick thickly covered with ordinary 
piraalic cement, We found this a very good lining for the 
descend 
cash wheel was built of wood, over a brick and wooden water 
