1wooden
part nine feet.
Round about the “dried” cakes are placed large
long pieces of charcoal, and in the pipe are placed medium-sized pieces.
When all these things have been arranged in this manner, the fire must be
more violently excited by the blast from the bellows. When the copper is
melting and the coals blaze, the master pushes an iron bar into the middle
of them in order that they may receive the air, and that the flame can force
its way out. This pointed bar is two and a half feet long, and its wooden
handle four feet long. When the cakes are partly melted, the master, passing
out through the door, inspects the crucible through the bronze pipe, and if he
should find that too much of the “slag” is adhering to the mouth of the pipe,
and thus impeding the blast of the bellows, he inserts the hooked iron bar
into the pipe through the nozzle of the bellows, and, turning this about the
mouth of the pipe, he removes the “slags” from it. The hook on this bar
is two digits high; the iron part of the handle is three feet long; the wooden
part is the same number of palms long. Now it is time to insert the bar
under the iron plate, in order that the “slags” may flow out. When the
cakes, being all melted, have run into the crucible, he takes out a sample of
copper with the third round bar, which is made wholly of iron, and is three feet
long, a digit thick, and has a steel point lest its pores should absorb the copper.
long pieces of charcoal, and in the pipe are placed medium-sized pieces.
When all these things have been arranged in this manner, the fire must be
more violently excited by the blast from the bellows. When the copper is
melting and the coals blaze, the master pushes an iron bar into the middle
of them in order that they may receive the air, and that the flame can force
its way out. This pointed bar is two and a half feet long, and its wooden
handle four feet long. When the cakes are partly melted, the master, passing
out through the door, inspects the crucible through the bronze pipe, and if he
should find that too much of the “slag” is adhering to the mouth of the pipe,
and thus impeding the blast of the bellows, he inserts the hooked iron bar
into the pipe through the nozzle of the bellows, and, turning this about the
mouth of the pipe, he removes the “slags” from it. The hook on this bar
is two digits high; the iron part of the handle is three feet long; the wooden
part is the same number of palms long. Now it is time to insert the bar
under the iron plate, in order that the “slags” may flow out. When the
cakes, being all melted, have run into the crucible, he takes out a sample of
copper with the third round bar, which is made wholly of iron, and is three feet
long, a digit thick, and has a steel point lest its pores should absorb the copper.
A—POINTED BAR. B—THIN COPPER LAYER. C—ANVIL.
D—HAMMER.
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