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When to these we add the adze, plane-irons, the anger, and the chisel, we sum up the tools principally relied on by the early mechanics for working in wood and iron. Such continued to be the chief tools in use down almost to our own day. The smith was at first the principal tool-maker; but special branches of trade were gradually established, devoted to tool-making.
The machine adapted as a tool-grinder has six emery-wheels for varying characters of work. Four are assorted for gauges of different radii, for moulding-irons, etc. One has a square face for plane-irons, chisels, etc. One is an emery hone to replace the water-of-Ayr stone.
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