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De Grand's Railroad from St. Louis to the Pacific - p185
doi:10.1038/scientificamerican03021850-185
Correspondence of the Scientific American - p186
doi:10.1038/scientificamerican03021850-186
New Plan of Laying the Foundation of Piers and Docks - p188
doi:10.1038/scientificamerican03021850-188g
Deception of Vision in Heights and Distances - p189
doi:10.1038/scientificamerican03021850-189b
Transactions of the N. Y. State Institution of Civil Engineers - p189
doi:10.1038/scientificamerican03021850-189e
History of Propeilers and Steam Navigation - p192
doi:10.1038/scientificamerican03021850-192a
Electric Clock Illuminated Dial at New Orleans - p192
doi:10.1038/scientificamerican03021850-192b
