The neighboring
rocks furnish the foundation stones and stones for the furnaces; the
decomposed schist gives the cement and refractory coating, and the
forest provides the wood necessary for the construction of the road,
sheds, etc. The head of the trip hammer, the anvils, and the tools are
the only objects that it is necessary to procure, and even these
the master of the forge often manufactures in part, after beginning
production with an incomplete set.
[Illustration: 7a FIG 1.--FOUR-CRUCIBLE FURNACE AND FORGE; (PLAN).]
_General Arrangement of a Forge_.--A forge usually consists of one or
two furnaces of three or four crucibles (the one shown in plan in Fig.
1 has only one four crucible furnace, A); 1 or 2 two fire reheating
furnaces, B; 1 trip hammer, C, actuated by a hydraulic wheel, D;
2 tromps which drive the wind, one of them, E, into the cadinhes
(crucibles), and the other, F, into the reheating furnace; 2 anvils,
G and H, placed near the furnace, for working delicate pieces; and
finally, the different tools that serve for maneuvering the bloom and
finishing the bars.
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