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  • A new form of the galvanometer
    My galvanometer is a Vervollkoinmnung of the N erva nd er'scheu of Construction while through Anbringuug of shield pin like on the gun, and Schutzbrettcheu mounted any Mengeu wire init vollkommner strength of the position on it k6nnen is wound.
  • Industrial Pins
    Escutcheon pin .