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The Mining Journal and American Rail Road Gazette - p306
doi:10.1038/scientificamerican06191847-306o
Cost of Monarchical and Republican Governments - p306
doi:10.1038/scientificamerican06191847-306q
Great Improvement in Journals for Steam Engines - p308
doi:10.1038/scientificamerican06191847-308
Grand Demonstration of the Mechanics at the Tabernacle - p309
doi:10.1038/scientificamerican06191847-309a
Motion, Resistance, and Effect on Mechinery - p309
doi:10.1038/scientificamerican06191847-309d
To Give Tin the Whiteness and Brilliancy of Silver - p312
doi:10.1038/scientificamerican06191847-312d