Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics (1892)
Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 790
constructed of iron, steel and iron welded, homogeneous plates of hard and soft steel and Franklinite. The vault is entered through the largest and strongest safe dcors ever made. There are four sets of double doors, having a combined weight of 48 tons, and yet they are easily opened and closed by… … 0.—\aiilt, fhfinical Bar.k.
Mechanical engineering
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