Gear's illustrated catalogue of wood and iron working machinery (1872)
A.S. Gear, Gear, A. S · Boston : Printed at A.S. Gear's printing office, 62 Sudbury Street · leaf 61
^^fe^««i$ li|)fi^t Sotiri^ ^kdl\ii:\e. … The accompanying cut represents an improved upriglit boring machine of a new pattern and design. The steelmandrel is IJ inches in diameter, is traversable, and can be made to bore 10 or 14 inches deep as may be ordered.A commodious treadle connects vrith the mandrel and brings it down to the…
