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In page Phonograph:

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An account of his invention was published on October 10, 1877, by which date Cros had devised a more direct procedure: the recording stylus could scribe its tracing through a thin coating of acid-resistant material on a metal surface and the surface could then be etched in an acid bath, producing the desired groove without the complication of an intermediate photographic procedure.[2] The author of this article called the device a phonographe, but Cros himself favored the word paleophone, sometimes rendered in French as voix du passé ('voice of the past').[citation needed]