Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 79
d show how theheavy wagon of coal is balanced in the office bythe weight on the scale-beam. A wedge made of oak ten inches in height andfive inches in width is indicated by Figure 4. Figure 5 represents a diminutive pile-driver,twenty-eight inches in length, showing the planand action of a large… … 6.] THE HANDIWORK OF SOME CLEVER BOYS. 549 the bobbin, or axle, and crank, on which the cordis wound that raises the hammer. This hammer isa flat piece of iron having two pieces of wood, eachfour by two and one-half inches in size, cementedto it. A wire hook is attached just above, and theextended…
Children's literature
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