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Townsend's Patent Apparatus for Warming and Ventillating Rail Road Cars - p49
doi:10.1038/scientificamerican11061846-49c
Information to Persons Having Business to Transact at the Patent Office - p50
doi:10.1038/scientificamerican11061846-51
Manufacture of Water Colors and Black Lead Pencils - p56
doi:10.1038/scientificamerican11061846-56