Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 440
medium size, weighing 5 lbs., andabout 16^ in. long, is most in use; but the weight varies from 4 to 7 lbs., some miners preferringthe largest size. Such picks are made stout and strong. The hammer end or head in the mediumsize is Si in. long and the point about 10 in., the eye being 3 by 1 in.…
Mechanical engineering -- Dictionaries
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