silver a fierce fire, and requires on that account a vigorous blast, places the
bellows very much inclined, in order that, when the silver has melted, it
may blow into the centre of the test. When the silver bubbles, he presses the
nozzle down by means of a small block of wood moistened with water and
fastened to an iron rod, the outer end of which bends upward. The silver
melts when it has been heated in the test for about an hour ; when it is
melted, he removes the live coals from the test and places over it two billets
of fir-wood, a foot and three palms long, a palm two digits wide, one palm
thick at the upper part, and three digits at the lower. He joins them
together at the lower edges, and into the billets he again throws the coals,
for a fierce fire is always necessary in refining silver. It is refined in two or
three hours, according to whether it was pure or impure, and if it is impure it
is made purer by dropping granulated copper or lead into the test at the
same time. In order that the refiner may sustain the great heat from the fire
while the silver is being refined, he lets down an iron door, which is three feet
long and a foot and three palms high ; this door is held on both ends in iron
plates, and when the operation is concluded, he raises it again with an iron
shovel, so that its edge holds against the iron hook in the arch, and thus the
door is held open. When the silver is nearly refined, which may be judged
by the space of time, he dips into it an iron bar, three and a half feet
long and a digit thick, having a round steel point. The small drops of silver
that adhere to the bar he places on the brass block and flattens with
a hammer, and from their colour he decides whether the silver is sufficiently
refined or not. If it is thoroughly purified it is very white, and in a bes there
is only a drachma of impurities. Some ladle up the silver with a hollow iron
implement. Of each bes of silver one sicilicus is consumed, or occasionally
when very impure, three drachmae or half an uncia*1.
The refiner governs the fire and stirs the molten silver with an iron
implement, nine feet long, a digit thick, and at the end first curved toward
the right, then curved back in order to form a circle, the interior of which is a
palm in diameter ; others use an iron implement, the end of which is bent
directly upward. Another iron implement has the shape of tongs, with
which, by compressing it with his hands, he seizes the coals and puts them on
or takes them off ; this is two feet long, one and a half digits wide, and the
third of a digit thick.
When the silver is seen to be thoroughly refined, the artificer removes
the coals from the test with a shovel. Soon afterward he draws water in
a copper ladle, which has a wooden handle four feet long ; it has a small
hole at a point half-way between the middle of the bowl and the edge, through
which a hemp seed just passes. He fills this ladle three times with water,
and three times it all flows out through the hole on to the silver, and slowly
quenches it ; if he suddenly poured much water on it, it would burst asunder
and injure those standing near. The artificer has a pointed iron bar, three
UA drachma of impurities in a bes, would be one part in 64, or 984.4 fine. A loss of a
sicilicus of silver to the bes, would be one part in 32, or about 3.1% ; three drachmae would
equal 4.7%, and half an uncia 6.2%, or would indicate that the original bullion had a fineness
in the various cases of about 950, 933, and 912.
