. De re metallica. Metallurgy; Mineral industries. 4i8 BOOK IX. If the tin is so impure that it cracks when struck with the hammer, it is not immediately made into lattice-hke bars, but into the cakes which I have spoken of before, and these are refined by melting again on a hearth. This hearth consists of sandstones, which slope toward the centre and a little toward a dipping-pot ; at their joints they are covered with lute. Dry logs are arranged on each side, alternately upright and lengthwise, and more closely in the middle ; on this wood are placed five or six cakes of tin which an togethe
. De re metallica. Metallurgy; Mineral industries. 4i8 BOOK IX. If the tin is so impure that it cracks when struck with the hammer, it is not immediately made into lattice-hke bars, but into the cakes which I have spoken of before, and these are refined by melting again on a hearth. This hearth consists of sandstones, which slope toward the centre and a little toward a dipping-pot ; at their joints they are covered with lute. Dry logs are arranged on each side, alternately upright and lengthwise, and more closely in the middle ; on this wood are placed five or six cakes of tin which an together weigh about six centum-pondia ; the wood having been A—Hearths. B—Dipping-pots. C—Wood. D -Cakes. E—Ladle. F—Copper PLATE. G—LaTTICE-SHAPKD BARS. H—IrON DIES. I—WOODEN MALLET. K—MASS OF TIN BARS. L—ShOVEL. the tin drips down and flows continuously into the dipping-pot which is on the floor. The impure tin sinks to the bottom of this dipping-pot and the pure tin floats on the top ; then both are ladled out by the master, who first takes out the pure tin, and by pouring it over thick plates of copper makes lattice-like bars. Afterward he takes out the impure tin from which he makes cakes ; he discriminates between them, when he ladles and pours, by the ease or difficulty of the flow. One centumfondium of the lattice-like bare sells for more than a centumpondium of cakes, for the price of the former. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Agricola, Georg, 1494-1555; Hoover, Herbert, 1874-1964. New York, Dover Publications
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