The Westinghouse Interlocking Switch and Signal System - p273

doi:10.1038/scientificamerican05031890-273

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A Questionable Patent Bill - p274

doi:10.1038/scientificamerican05031890-274

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The Oil Well at Southbury, Conn - p275

E. O. Hovey, By

doi:10.1038/scientificamerican05031890-275

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An Improved Automatic Dumb Waiter - p276

doi:10.1038/scientificamerican05031890-276

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An Improved Water Tower and Extension Ladder - p276

doi:10.1038/scientificamerican05031890-276a

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An Improved Brace for Piano String Frames - p276

doi:10.1038/scientificamerican05031890-276b

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An Improved Time Register - p277

doi:10.1038/scientificamerican05031890-277

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New German Armor-Clad Cruisers - p277

doi:10.1038/scientificamerican05031890-277a

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An Improved Windlass - p277

doi:10.1038/scientificamerican05031890-277b

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An Improved Shaft Lighter - p277

doi:10.1038/scientificamerican05031890-277c

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An Improved Animal Bed - pp277 - 278

doi:10.1038/scientificamerican05031890-277d

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Preserve for Binding - p278

doi:10.1038/scientificamerican05031890-278

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The Wilzin Automatic Knife - p279

doi:10.1038/scientificamerican05031890-279

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An Improved Hay Sling - p279

doi:10.1038/scientificamerican05031890-279a

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The Proposed Suspension Bridge across the Hudson River at New York - pp280 - 283

doi:10.1038/scientificamerican05031890-280

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An Improved Grinding Machine - p283

doi:10.1038/scientificamerican05031890-283

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An Improved Steam Engine Valve - p283

doi:10.1038/scientificamerican05031890-283a

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Automatic Time and Dating Stamps - p283

doi:10.1038/scientificamerican05031890-283b

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Scientific American Building Edition - p284

doi:10.1038/scientificamerican05031890-284b

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To Inventors - p284

doi:10.1038/scientificamerican05031890-284e

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The Scientific American Established 1846 - p288

doi:10.1038/scientificamerican05031890-288a

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