A drum recording instrument by Julien P. Friez, Belfort Observatory, Baltimore, with lacquered brass drum and mechanism on japanned iron base with coloured and gilt decoration, the (defective) stylus activated by ratchet-and-pawl from an electro-magnet, with glazed cover --15½in. wide

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A drum recording instrument by Julien P. Friez, Belfort Observatory, Baltimore, with lacquered brass drum and mechanism on japanned iron base with coloured and gilt decoration, the (defective) stylus activated by ratchet-and-pawl from an electro-magnet, with glazed cover --15½in. wide

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