Electrolysis in Armored Concrete - p306

doi:10.1038/scientificamerican04131907-306

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In Touch with the Conditions - p306

doi:10.1038/scientificamerican04131907-306a

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A New Theory of Gun Erosion - pp306 - 307

doi:10.1038/scientificamerican04131907-306b

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The Value of the Nile Barrages to Egypt - p307

doi:10.1038/scientificamerican04131907-307

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Seal Hunting on the Ice Floes of the North - p308

Allen Day

doi:10.1038/scientificamerican04131907-308

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The North Carolina-Virginia Inland Waterway - pp309 - 310

H. L. Wilson

doi:10.1038/scientificamerican04131907-309

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Branch Railways by the Telpherage System - pp311 - 312

doi:10.1038/scientificamerican04131907-311

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The Carnegie Technical Schools, Pittsburg, Pa - pp313 - 314

Day Allen Willey

doi:10.1038/scientificamerican04131907-313

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Capt. Ferber's Aeroplane Experiments - p315

doi:10.1038/scientificamerican04131907-315

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Adjustable Boring Tool - p316

doi:10.1038/scientificamerican04131907-316

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Lubricator for Street Railway Motors - p316

doi:10.1038/scientificamerican04131907-316a

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Screw Driver with a Centering Device - p316

doi:10.1038/scientificamerican04131907-316b

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Armored-Concrete Railway Tie - p316

doi:10.1038/scientificamerican04131907-316c

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Stanchion for Cattle - pp316 - 317

doi:10.1038/scientificamerican04131907-316d

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Recording Auto Speed Meter - p317

doi:10.1038/scientificamerican04131907-317

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