nce, R. I., all of which are note- drill point is cruciform in transverse section, having three ated by hand levers. of the wings or blades sharpened on the lower edges, and worthy for excellence of design, finish, durability, and gen one wing squared and a little shorter than the eral eiHciency.… … which employs a wheel having buckets upon frame. One of them is designed for cutting Fig. l.-IMPROVED GRINDSTONE TROUGH. its periphery, against which the stream of bevel, and the other spur gear, teeth. They water is made to impinge. The improve- are specially intended for cutting the small ments…
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