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Scientific American, Vol. 41, No. 12 (1879) (1879)
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the room to remain closed for twenty-four ee have a large pipe connection all to themselves. The ordi- NEW FLANGE COUPLING. hours. For a room about ten feet square, at least two nary cross body safety valve is very much to be condemned, The annexed engraving represents an improved flange | pounds… … than one inch pipe, top and bottom; the top or steam con- moved to the open airand thoroughly beaten. of steam in either will cause the glass to show more water with the zinc solution, and buried at once. Metallic, metal- of 90°, © 1879 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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