Hawkins, N. (Nehemiah), 1833- · New York : Theo. Audel · leaf 131
oden step is madespherical—convex—to fitinto the end of the shaft.The step is formed in thisway so that no sand canlodge between the bearingsurfaces, and cut them out.The resident oil in thewood combined with thewater make a most durable means of lubrication, and thesesteps last for many months… … Fig. \n. Turbine. Wahr Wheels. ^-^-^ has passed through the wheel, as it flows away into the tailrace. Any shght variation in the form of blckets or admissionapertures will make an appreciable variation in the quantityof water discharged by a turbine wheel. These wheels are made either for vertical…
Hydraulic machinery · Pumping machinery
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
