A FIELD GLASS CAMERA. Relies from Denmark. Dangers of Ammonia. The Saxon Tunnel Works Suspended. 4 0 IN A FIELD GLASS CAMERA., scientific american, 1892-09-24

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A FIELD GLASS CAMERA. Relies from Denmark. Dangers of Ammonia. The Saxon Tunnel Works Suspended. 4 0 IN A FIELD GLASS CAMERA., scientific american, 1892-09-24

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