Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 275
nd under-shotwheels to reactors or turbines, has involved an entire change of construction,and now only wrought-iron is used. AYooden shafts are often used in ma-chines subject to wet and shocks, or from the greater convenience in obtainingthe material, and from this last necessity the journals and… … Fig. 549.
Mechanical drawing
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