Philocophus: or, The deafe and dumbe mans friend. Exhibiting the philosophicall verity of that subtile art, which may inable one with an observant eie, to heare what any man speaks by the moving of his lips / ... By J.B. surnamed the Chirosopher.

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Philocophus: or, The deafe and dumbe mans friend. Exhibiting the philosophicall verity of that subtile art, which may inable one with an observant eie, to heare what any man speaks by the moving of his lips / ... By J.B. surnamed the Chirosopher. Public Domain Mark. Source: Wellcome Collection.