Archive image from page 571 of De re metallica (1950). De re metallica deremetallica50agri Year: 1950 534 BOOK XI. wooden 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
Archive image from page 571 of De re metallica (1950). De re metallica deremetallica50agri Year: 1950 534 BOOK XI. wooden 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 beUows, he inserts the hooked iron bar into the pipe through the nozzle of the beUows, 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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