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Scientific American, Vol. 63, No. 11 (September 1890) (1890)

leaf 3

An illustration from Scientific American, Vol. 63, No. 11 (September 1890), 1890, leaf 3
dford, Pa. adapted to lift the boats above the level of the tank. facilitate the wiping of school-slates, or the erasing of After they have been thus lifted the carriage may be certain portions only of what may be inscribed there- Condition of Workers Here and Abroad. moved transversely and the… … the nation and its in- INGLIS' ARTIFICIAL WATER SLIDE FOR PLEASURE RESORTS. HUDSON'S SLATE SPONGE. © 1890 SCIENTIFIC AMERICAN, INC.

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