The Coast Survey. NOVEL MACHINE FOR DEMAGNETIZING WATCHES. ENLARGED VIEW OF WATCH HOLDER. Improvements in New York Harbors. Curious Experiment in ItIagnetisin. MAXIM'S MACHINE FOR DEMAGNETIZING WATCHES., scientific american, 1881-08-27


The Coast Survey. NOVEL MACHINE FOR DEMAGNETIZING WATCHES. ENLARGED VIEW OF WATCH HOLDER. Improvements in New York Harbors. Curious Experiment in ItIagnetisin. MAXIM'S MACHINE FOR DEMAGNETIZING WATCHES., scientific american, 1881-08-27


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