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How to make Deaf Persons Hear the Pianoforte - p377
doi:10.1038/scientificamerican08121854-377c
Converting Rotary into Reciprocating Motion - p380
doi:10.1038/scientificamerican08121854-380d
Baker's Furnace and the Fire Annihilator - p381
doi:10.1038/scientificamerican08121854-381b