The Sandy Hook Mortar Batteries - p241

doi:10.1038/scientificamerican04161898-241

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American Supremacy in the Iron Trade - p242

doi:10.1038/scientificamerican04161898-242

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New Bills for the Regulation of Print and Label Registration - pp242 - 243

doi:10.1038/scientificamerican04161898-242a

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Ptomaine Poisoning - p243

doi:10.1038/scientificamerican04161898-243

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The Navies of the World - p243

doi:10.1038/scientificamerican04161898-243a

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Jubilee Anniversary of the American Science Association - p243

Horace O. Hovey

doi:10.1038/scientificamerican04161898-243b

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A Dredge Ejector - p244

doi:10.1038/scientificamerican04161898-244

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A Locomotive and its Equivalent in Raw Materials - p244

doi:10.1038/scientificamerican04161898-244a

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An Improved Car Coupling - p244

doi:10.1038/scientificamerican04161898-244b

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The New Steel Arch at Niagara - pp245 - 246

doi:10.1038/scientificamerican04161898-245

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An Automatically Closing Umbrella - p246

doi:10.1038/scientificamerican04161898-246

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The Key of the Gulf—The Tortugas Islands - pp248 - 249

C. F. Holder

doi:10.1038/scientificamerican04161898-248

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Pueblo Arts and Industries.–II - pp249 - 250

Cosmos Mindeleff

doi:10.1038/scientificamerican04161898-249

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Leonardo Da Vinci's High Angle Mortar - p251

doi:10.1038/scientificamerican04161898-251

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