Figs. 80, 81.
Fig. 82.
In England, for small works, the entire boring apparatus is frequently arranged as in [Fig. 83], the tool being fixed at the end of the wrought-iron rods instead of at the end of a rope, as in the Chinese method. Referring to [Fig. 83], A is the boring tool; B the rod to which the tool is attached; D D the levers by which the men E E give a circular or rotating motion to the tool; F, chain for attaching the boring apparatus to the pole G, which is fixed at H, and by its means the man at I transmits a vertical motion to the boring tool.
