Big Guns for Coast Defense - p352

doi:10.1038/scientificamerican12061890-352

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Progress of Aluminum - p352

doi:10.1038/scientificamerican12061890-352a

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Pigeons as Dispatch Carriers - pp352 - 353

doi:10.1038/scientificamerican12061890-352b

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A Mountain Railway Near New York City - pp353 - 354

doi:10.1038/scientificamerican12061890-353

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A Refrigerator Vehicle for Perishable Articles - p354

doi:10.1038/scientificamerican12061890-354

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An Automatic Steam Boiler Feeder - p354

doi:10.1038/scientificamerican12061890-354a

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A Brake for Street Cars - p355

doi:10.1038/scientificamerican12061890-355

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An Improved Elevator Gate - p355

doi:10.1038/scientificamerican12061890-355a

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A Cork-Drawing Device - p355

doi:10.1038/scientificamerican12061890-355b

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A Marker for Wood-Workers - p355

doi:10.1038/scientificamerican12061890-355c

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An Improved Wrench - pp355 - 356

doi:10.1038/scientificamerican12061890-355d

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The Defense of New York - p356

doi:10.1038/scientificamerican12061890-356

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Cure of Consumption—An Interview with Professor Koch - pp358 - 359

Charles Hacks

doi:10.1038/scientificamerican12061890-358

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Safe Construction of Buildings - pp360 - 361

doi:10.1038/scientificamerican12061890-360

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Electric Chimes - p361

doi:10.1038/scientificamerican12061890-361

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To Inventors - p363

doi:10.1038/scientificamerican12061890-363

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