Five hundred and seven mechanical movements (1903)
Brown, Henry T. [from old catalog] · New York, Brown & Seward · leaf 123
500 … 501 %r ^. Mechanical Movements. 119 493. Lewis. for J^ft:ng stone in building. Itis composed of a central taper pin or wedge, withtwo wedge-like packing-pieces arranged one oneach side of it. The three piece? are insertedtogether in a hole drilled into the stone, andwhen the central wedge is…
Mechanical movements
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