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A Machine for Forming and Hardening Hat Bodies - p43
doi:10.1038/scientificamerican10171857-43c
Rapid Circulation Necessary for City Water - p45
doi:10.1038/scientificamerican10171857-45a
Patent Office Management—Liberality of Examiners—Sale of Patent Rights - p45
doi:10.1038/scientificamerican10171857-45c
The Twenty-ninth Annual Fair of the American Institute - p46
doi:10.1038/scientificamerican10171857-46
New Prospectus of the Scientific American - p48
doi:10.1038/scientificamerican10171857-48d
