The Waste of our Natural Resources - p438

doi:10.1038/scientificamerican06121909-438

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Fewer Broken Rails - p438

doi:10.1038/scientificamerican06121909-438a

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A New Fire-Alarm System for New York - p438

doi:10.1038/scientificamerican06121909-438b

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Automobile - p439

doi:10.1038/scientificamerican06121909-439

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Electricity - p439

doi:10.1038/scientificamerican06121909-439a

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Science - p439

doi:10.1038/scientificamerican06121909-439b

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Belin's Improved Apparatus for the Electrical Transmission of Pictures - p440

Jacques Boyer

doi:10.1038/scientificamerican06121909-440

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Is the Earth's Shape Changing - pp441 - 442

J. F Springer

doi:10.1038/scientificamerican06121909-441

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Impressions of American Inventors.—II - p443

doi:10.1038/scientificamerican06121909-443a

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Experiments with Hydroplanes or Skimmers - pp444 - 445

doi:10.1038/scientificamerican06121909-444

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Artificial Rubies - pp445 - 446

Victor Barton

doi:10.1038/scientificamerican06121909-445

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An Automobile Trolley-Repair Truck - p446

Alfred Gradenwitz

doi:10.1038/scientificamerican06121909-446

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Handy Man's Workshop - p447

doi:10.1038/scientificamerican06121909-447

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A Simple Medical Coil - p447

Frederick E. Ward

doi:10.1038/scientificamerican06121909-447a

PDF (372 KB)