Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 716
DETAILS OF WINDMILL. 536 THE PRACTICAL BOY. 537 wheel into the wind is made in proportion tothe size of the mill. A PUMPING WINDMILL. A simple wheel, with spokes and sails, that iscommonly employed on canal-boats and barges, … FIG. 3. A PUMPING WINDMILL. and in a small way for raising water in a suc-tion-pump, is shown in Fig. 3. The hub is ahexagon of 6 inches side and 6 inches long, sothat one spoke can be driven into a hole madein opposite sides, as shown at I in Fig. 4.The spokes are 3 feet long, 3 inches wide,…
Children's literature
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