Brass . 
I in 
ri.;!:rd down. Successive coatings of silver leaf may be 
thus n. 
k~ [ -zg, on copper and brass may be performed by 
the mu of silver mixed with whiting, common salt and 
cream of tartar in the way I have mentioned. The whit- 
ing should be previously washed and the first coarse sedi- 
ment permitted to subside : the sediment of the super- 
natant liquor should alone be used, either for this purpose 
or any purpose of cleaning silver or brass ; because, the 
common whiting is apt to have gross particles of sand in 
it, that will scratch the surface. 
Or, to a solution of silver in aqua fortis, add some 
clean plates of copper : the silver will be thrown down in 
a fine powder in its metallic state. Separate it from the 
surface of the copper, and wash it well. Of this powder 
take one part, common salt and sal ammoniac four parts 
by weight, corrosive sublimate one fourth of a part. Rub 
them well together in a mdrtar with a little water, into a 
paste. Clean the vessel to be silvered by any dilute acid, 
or by common salt and tartar : rub it with this paste till it 
acquires a metallic coating, which will be an amalgam 
®f mercury from the corrosive sublimate with silver, pro- 
duced by the triple action of the silver, the copper, and 
the mercurial salt. Wash the coated surface; then ex- 
pose it to heat so as to drive off the mercury, and the sil- 
ver remaining on the copper, may be burnished in the 
common way. 
Or, mix 20 grains of silver precipitated by copper, 2 
drachms of tartar, two drachms of common salt, and half a 
drachm of alum. This composition being rubbed on a 
clean surface of brass or copper will cover it with a coat- 
ing of silver, which may be polished with soft leather. 
Or, take half an ounce of silver precipitated by copper 
from aqua fortis : grind it up with two ounces of sal am- 
moniac, two ounces of common salt, and one drachm of 
