mpact and portaole form. It can be set in the place of any common water wheel with the same expense of foundation, fluming, gearing, etc. The inventor's experience for the last twelve years in building the Jonval turbine, including his experi- ments at the Fairmount Water works, Philadelphia, in… … STEVENSON'S HELICAL .TURBINE. put up and geared, 80 per cent of useful effect will Fig. 1 is a perspective view of the turbine complete. the wheel, which causes a loss of power by friction. be obtained; the experience of the last few years has In the hollow shaft is an opening suitable for oiling…
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