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Scientific American, Vol. 9, No. 37 (1854) (1854)

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An illustration from Scientific American, Vol. 9, No. 37 (1854), 1854, leaf 0
CS, % [NUMBER 37. VOLUME IX.) … im the usual manner. The dam being made in axles in proper foot bearings, they are raised sections can be operated and managed with a secured. These have pivot foot rests, a, below, Sectional Portable Dam, for the golden sanded and lowered with comparative ease. Having few hands and with great…

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