Entered at the Poet Office of New York N. Y. as Second Clue Matter. Vol. LV No. rPrice 10 Cents. L$ per Near. THE DEMAGNETIZATION OF WATCHES. MACHINE FOB DEMAGNETIZING WATCHES., scientific american, 1886-10-02


Entered at the Poet Office of New York N. Y. as Second Clue Matter. Vol. LV No. rPrice 10 Cents. L$ per Near. THE DEMAGNETIZATION OF WATCHES. MACHINE FOB DEMAGNETIZING WATCHES., scientific american, 1886-10-02


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