ndermining” and “side-cutting ”’ seams of these ways fits the piece, G, provided with a coal, but it is also applicable in other mining quadrant, H, in°which the tool is held at any It consists chicfly or tunneling operations. angle by the set screw, b. This piece, G, can of a cutter wheel,… … and are afterwards laid together in the same them thoroughly intelligible to our readers, For slotting, the tool-box, M, is held as for runs a small roller, V, attached to the end of we have added the accompanying engraving : way as the strands of ordinary rope. The shaping, when the slotting tool…
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