The Mono-Rail for High-Speed Travel - p242

doi:10.1038/scientificamerican10201900-242

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The Water-Tube Boiler on Trial - p242

doi:10.1038/scientificamerican10201900-242a

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The “Wisconsin” and the “Variag” - p242

doi:10.1038/scientificamerican10201900-242b

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The Latest Developments of Wireless Telegraphy - pp242 - 243

doi:10.1038/scientificamerican10201900-242c

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Calcium Carbide at the Congress of Applied Chemistry - p243

doi:10.1038/scientificamerican10201900-243

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The Congress of Applied Chemistry at Paris - p243

doi:10.1038/scientificamerican10201900-243a

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Borax in Europe - p243

doi:10.1038/scientificamerican10201900-243b

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A New Military Folding Bicycle - p244

doi:10.1038/scientificamerican10201900-244

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A Collapsible Lathe-Dog - p244

doi:10.1038/scientificamerican10201900-244a

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Paris Exposition—Building of the German Marine - p245

doi:10.1038/scientificamerican10201900-245

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Reconstruction in Concrete of Dry Dock No. 2, New York Navy Yard - p246

doi:10.1038/scientificamerican10201900-246

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A Mechanical Scarifier - p248

doi:10.1038/scientificamerican10201900-248

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The 16-Inch Rifle and 20-Inch Smooth-Bore Compared - p248

doi:10.1038/scientificamerican10201900-248a

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Strengthening the Cantilever Bridge at Niagara - pp249 - 250

doi:10.1038/scientificamerican10201900-249

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The Pantry Moth - p250

S. Frank Aaron

doi:10.1038/scientificamerican10201900-250

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Re-Invention in the World of Surgery - p251

R. E. Thomas

doi:10.1038/scientificamerican10201900-251

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