1will be found in the bottom
of the cupel.
The fire consumes both of those
metals more quickly if they are heated in that furnace which draws in air. It
is better to cover the upper half of it with a lid, and not only to put on the
muffle door, but also to close the window of the muffle door with a piece of
charcoal, or with a piece of brick. If the copper be such that the silver can
only be separated from it with difficulty, then before it is tested with fire in
the cupel, lead should first be put into the scorifier, and then the copper should
be added with a moderate quantity of melted salt, both that the lead may
absorb the copper and that the copper may be cleansed of the dross which
abounds in it.
metals more quickly if they are heated in that furnace which draws in air. It
is better to cover the upper half of it with a lid, and not only to put on the
muffle door, but also to close the window of the muffle door with a piece of
charcoal, or with a piece of brick. If the copper be such that the silver can
only be separated from it with difficulty, then before it is tested with fire in
the cupel, lead should first be put into the scorifier, and then the copper should
be added with a moderate quantity of melted salt, both that the lead may
absorb the copper and that the copper may be cleansed of the dross which
abounds in it.
Tin which contains silver should not at the beginning of the assay be
placed in a cupel, lest the silver, as often happens, be consumed and converted
into fumes, together with the tin. As soon as the lead35 has begun to fume
in the scorifier, then add that36 to it. In this way the lead will take the
silver and the tin will boil and turn into ashes, which may be removed with a
wooden splinter. The same thing occurs if any alloy is melted in which there
is tin. When the lead has absorbed the silver which was in the tin, then,
and not till then, it is heated in the cupel. First place the lead with which
the silver is mixed, in an iron pan, and stand it on a hot furnace and let it
melt; afterward pour this lead into a small iron mould, and then beat it
out with a hammer on an anvil and make it into leaves in the same way as
the copper. Lastly, place it in the cupel, which assay can be carried out in
the space of half an hour. A great heat is harmful to it, for which reason
there is no necessity either to cover the half of the furnace with a lid or to
close up its mouth.
placed in a cupel, lest the silver, as often happens, be consumed and converted
into fumes, together with the tin. As soon as the lead35 has begun to fume
in the scorifier, then add that36 to it. In this way the lead will take the
silver and the tin will boil and turn into ashes, which may be removed with a
wooden splinter. The same thing occurs if any alloy is melted in which there
is tin. When the lead has absorbed the silver which was in the tin, then,
and not till then, it is heated in the cupel. First place the lead with which
the silver is mixed, in an iron pan, and stand it on a hot furnace and let it
melt; afterward pour this lead into a small iron mould, and then beat it
out with a hammer on an anvil and make it into leaves in the same way as
the copper. Lastly, place it in the cupel, which assay can be carried out in
the space of half an hour. A great heat is harmful to it, for which reason
there is no necessity either to cover the half of the furnace with a lid or to
close up its mouth.
The minted metal alloys, which are known as money, are assayed in the
following way. The smaller silver coins which have been picked out from
the bottom and top and sides of a heap are first carefully cleansed; then, after
they have been melted in the triangular crucible, they are either resolved
into granules, or made into thin leaves. As for the large coins which weigh
a drachma, a sícílícus, half an uncía, or an uncia, beat them into leaves.
Then take a bes of the granules, or an equal weight of the leaves, and likewise
take another bes in the same way. Wrap each sample separately in paper,
and afterwards place two small pieces of lead in two cupels which have first
been heated. The more precious the money is, the smaller portion of lead
do we require for the assay, the more base, the larger is the portion required;
for if a bes of silver is said to contain only half an uncia or one uncia of copper,
we add to the bes of granules half an uncía of lead. If it is composed of equal
parts of silver and copper, we add an uncía of lead, but if in a bes of copper
there is only half an uncía or one uncía of silver, we add an uncía and a half
of lead. As soon as the lead has begun to fume, put into each cupel one of
the papers in which is wrapped the sample of silver alloyed with copper, and
close the mouth of the muffle with charcoal. Heat them with a gentle fire
until all the lead and copper are consumed, for a hot fire by its heat forces the
following way. The smaller silver coins which have been picked out from
the bottom and top and sides of a heap are first carefully cleansed; then, after
they have been melted in the triangular crucible, they are either resolved
into granules, or made into thin leaves. As for the large coins which weigh
a drachma, a sícílícus, half an uncía, or an uncia, beat them into leaves.
Then take a bes of the granules, or an equal weight of the leaves, and likewise
take another bes in the same way. Wrap each sample separately in paper,
and afterwards place two small pieces of lead in two cupels which have first
been heated. The more precious the money is, the smaller portion of lead
do we require for the assay, the more base, the larger is the portion required;
for if a bes of silver is said to contain only half an uncia or one uncia of copper,
we add to the bes of granules half an uncía of lead. If it is composed of equal
parts of silver and copper, we add an uncía of lead, but if in a bes of copper
there is only half an uncía or one uncía of silver, we add an uncía and a half
of lead. As soon as the lead has begun to fume, put into each cupel one of
the papers in which is wrapped the sample of silver alloyed with copper, and
close the mouth of the muffle with charcoal. Heat them with a gentle fire
until all the lead and copper are consumed, for a hot fire by its heat forces the