, each side power. Blecks can be cut off any size for The annexed engravings are views of a teeth of the wheel, shown in fig. 3. roofing slate, thereby effecting a great saving machine for quarrying slate, for which a pat- OpgeraTion—The frame, A, is properly of material. It is adapted for… … crank handles, which really appears to be know, is the first machine successfully ap- better than oars, as it will be a fixture. The plied to this purpose. see figs. 1 and 2. And when the portion, b’ intended to operate. Motion is then given two sections are braced together by angle A represents a…
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