[Webmagick-users] dications of l

[Polovoy <de...@si...>]

Us acid, we may add, is the predominant smell in a copper-work; but
arsenic acid, hydrofluoric acid, and even arseniuretted hydrogen, are
not at all unfrequent. 2. _Melting the Calcined Ore._--This is a totally
different operation from the last: in place of roasting, it is one of
fusion. The calcined ore is put into the furnace much in the same manner
as before; a quantity of the slag from a subsequent process is added to
assist in the fusion, and the heat