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Correspondence of the Scientific American - p242
doi:10.1038/scientificamerican04201850-242
Lewiston and Queenston Suspension Bridge - p242
doi:10.1038/scientificamerican04201850-242d
Improved Machinery for Making Cotton Batting and for Sizing and Drying it - p244
doi:10.1038/scientificamerican04201850-244d
Changes in Society—Progress of Travelling - p245
doi:10.1038/scientificamerican04201850-245
History of Propellers and Steam Navigation - p248
doi:10.1038/scientificamerican04201850-248a
