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Scientific American, Vol. 31, No. 13 (1874) (1874)
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ter the oe __——. New Electromagnetic Station Indicator. KINZEL’S RAILWAY TRACK LIFTER. edges of the casting are roughed off, the solid wheel is re- Mr. Charles W. White, of New York city, has patented, This is a simple device for lifting railway tracks which, it moved, a covered one substituted,… … ent plants, by the common reagent for that acid, a solution The greatestdepth of of potassium iodide, starch, and sulphuric acid, which gives to the liquid containing nitrous acid a fine blue color. Sub- sequently, however, he was led to attribute this bluing to © 1874 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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