Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 186
between them with longscrews or steel nails. To utilize the power from arapidly running brook, place twotree-trunks across the brook, about6 feet apart, as shown in the illus-tration. On top of these timbersattach two spruce beams 8 or 10inches wide and 2 inches thick, andanchor them well with… … THE WATER-WHEEL IN OPERATION. be used will determine which kind of wheel isdesirable. Then the time at the boys disposalmust be considered; for it would be folly toattempt an elaborate water-power plant if thevacation were very short. yi6 THE PRACTICAL BOY,
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