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Scientific American, Vol. 25, No. 12 (1871) (1871)

leaf 7

An illustration from Scientific American, Vol. 25, No. 12 (1871), 1871, leaf 7
county tirely removed. By repeating this operation once every two rights offered for sale. or three months (according to the condition of the water) the as itis the only sound medium of a full compass that will filter can be kept clean for years without removing the filter- > ee ae keep in tune… … The hooks are attached to a metallic frame lligent, civilized race of hunters of not less than PARROT & McCAULEY’S WATER FILTER. or bridge, which is fixed toa sound board, 10,000 souls. as clearly shown, the sound board being in this case vertical Fig.2 represents a vertical central section of the…

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