The Pennsylvania Railroad Tunnel - p372

doi:10.1038/scientificamerican12061902-372

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Test of the Maximum Capacity of the Niagara Falls Tunnel - p372

doi:10.1038/scientificamerican12061902-372a

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The Gun in Naval Warfare - p372

doi:10.1038/scientificamerican12061902-372b

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The Death of Friedrich Krupp - pp372 - 373

doi:10.1038/scientificamerican12061902-372c

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An American Parallel to the Tulip Craze in Holland - p373

Irving U. Townsend

doi:10.1038/scientificamerican12061902-373

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Restoration of the Parthenon - p373

doi:10.1038/scientificamerican12061902-373a

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Non-Freezing Hydrant - p374

doi:10.1038/scientificamerican12061902-374

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Reversible Screw-Propeller - p374

doi:10.1038/scientificamerican12061902-374a

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The Navipendulum Method of Experiment - pp374 - 375

doi:10.1038/scientificamerican12061902-374b

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The New Plant of the Canadian Niagara Falls Company - pp375 - 376

Orrin E. Dunlap

doi:10.1038/scientificamerican12061902-375

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The Manufacture of Toys and Dolls - p376

doi:10.1038/scientificamerican12061902-376

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The New Monitor “Wyoming” - p378

doi:10.1038/scientificamerican12061902-378

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Guatemala's Earthquakes - pp379 - 380

Thomas R. Dawley, Jr

doi:10.1038/scientificamerican12061902-379

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An Experimental Mono-Rail Line - p380

Day Allen Willey

doi:10.1038/scientificamerican12061902-380

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Business and Personal Wants - p381

doi:10.1038/scientificamerican12061902-381a

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