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Scientific American, Vol. 65, No. 21 (1891) (1891)

leaf 10

An illustration from Scientific American, Vol. 65, No. 21 (1891), 1891, leaf 10
ps at temptation is often great to make one or two trays description is hardly necessary ; the engravings tell the that place have ten 3 inch Cook brass strainer tube answer all purposes ; but modern photography forbids whole story. wells 30 to 60 feet in the ground, nearly all of which the double… … unduly exposing the plate. It consists of a two-candle power incandescent lamp attached to a handle and inclosed by a hemispherical reflector closed at the front receive a wire which is bent at one end, forming a The lamp is held near the plate. All of the light is thrown downward, so Black Jack…

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