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Coloring Black.—Scruples about becoming a Subscriber - p153
doi:10.1038/scientificamerican01291853-153a
Machinery and Tools as they are.—Geared Wheels - p155
doi:10.1038/scientificamerican01291853-155
Patent Office Report—The Typhoductor, or Storm Pointer - p158
doi:10.1038/scientificamerican01291853-158b