Useful Knowledge: Volume 1. Minerals: Or, a familiar account of the various productions of natureBingley, William
History
Useful Knowledge: Volume 1. Minerals: Or, a familiar account of the various productions of nature
Bingley, William
Commercial products; Geology, Economic; Natural history
Gold was formerly obtained in Scotland. It is asserted that, at the
marriage of James V. there were covered dishes filled with coins made of
Scottish gold, and that a portion of these was presented to each of the
guests by way of dessert. Very extensive operations for the discovery of
gold were carried on during the reign of Queen Elizabeth, at Leadhills,
in Lanarkshire, under the direction of an Englishman whose name was
Bulmer. The trenches, the heaps of soil that were turned up, and other
marks of these operations, are yet visible near the road between
Leadhills and Elvanfoot. It is said that 300 men were then employed; and
that, in the course of a few years, a quantity of gold was collected,
equal in value to 100,000_l._ sterling. Not many years ago similar
operations were commenced under the superintendence of a celebrated
manager of the Scottish lead mines. The gold was found immediately under
the vegetable soil; and the method of obtaining it was to direct a small
stream of water, so as to carry the soil along with it, to basins or
hollow places, where the water might deposit the matters carried down by
the force of its current. The matter thus deposited was repeatedly
washed, till the whole of the earthy substances were carried off. The
gold, being heaviest, sunk to the bottom, and remained behind. The soil
still furnishes gold; but the produce would by no means be equal to the
expense of collecting it. Searching for gold, therefore, is now regarded
only as an amusement, and not as a source of profit. Grains of this
metal are sometimes found, after great floods, among the sand of brooks
in different parts of Scotland.
The mode of extracting gold from its ore is by reducing it into a fine
powder, and mixing this powder with quicksilver (228). The latter having
the quality of uniting with itself every particle of the precious metal,
but being incapable of union with the other substances, extracts it even
from the largest portions of earth. The quicksilver, which has absorbed
the gold, is then separated by means of heat; it flies off in vapour,
and leaves the other metal in the vessel used for the operation.
Gold has been known, and in request, from the very earliest ages of the
world. By the assent of civilized nations, it has become the
representative of wealth under the form of money; and it is now an
universal circulating medium for the purchase of all kinds of
commodities. It has been chosen to occupy this important place on
account of its scarcity, its weight, and other valuable properties.
Public-domain text, read in full here on John Shaqi.
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