Johnson's natural philosophy and key to philosophical charts : illustrated with 500 cuts; being reduced photographic copies of all the diagrams contained in the author's philosophical series of indestructible school charts ; for the use of schools and families (1878)
nished either with buckets orfloat-boards, TL, fitting the water-course. N is the gate for shuttingoff the water. ^■^- 161. Figure 7.- Undershot water-wheel.—This is providedwith vanes, or float-boards,projecting from its peri-phery into the stream, assliown, and is moved prin-cipally by the… … IS for elevating (166). HYDRA ULICS. 117 162. Figure 8.—Turbine water-wheel.—The turbine, ofwhich there are many moditieations, is a lioiizoiital wheel. It workssubmerged, and is the most energetic and economical of all theAvater-Avheels; some of them having utilized eighty-eight per cent,of the…
Physics · Astronomy
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