The Peril of the Turnstile Door - p238

doi:10.1038/scientificamerican04041908-238

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The Senate Hearing on the Alleged Defects of our Navy - p238

doi:10.1038/scientificamerican04041908-238a

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Government Aid in the Development of Aeronautics - pp238 - 239

doi:10.1038/scientificamerican04041908-238b

PDF (263 KB)

Scientists at Play - p239

Herbert W. Horwill

doi:10.1038/scientificamerican04041908-239

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Decolorizing Power of Animal Charcoal - p239

doi:10.1038/scientificamerican04041908-239a

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The Current Supplement - p239

doi:10.1038/scientificamerican04041908-239b

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Lowering the Traction Tunnels Tinder the Chicago River - p240

L. F. Wilson

doi:10.1038/scientificamerican04041908-240

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Japanese Battleship “Iwami” as she was and is—A Lesson in “Freeboard” - pp241 - 242

doi:10.1038/scientificamerican04041908-241

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Lippmann's Method of Stereophotography without a Lens - p242

doi:10.1038/scientificamerican04041908-242

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A New Apparatus for Submarine Operations - p243

doi:10.1038/scientificamerican04041908-243

PDF (396 KB)

The Manufacture of Mechanical Organs - pp244 - 245

Jacques Boyer

doi:10.1038/scientificamerican04041908-244

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Saturn's Rings - p246

S. A. Mitchell

doi:10.1038/scientificamerican04041908-246

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Patent Department - p247

doi:10.1038/scientificamerican04041908-247

PDF (244 KB)

Gas Engine Igniter - p247

doi:10.1038/scientificamerican04041908-247a

PDF (244 KB)

Casting Tool for Printing Offices - p247

doi:10.1038/scientificamerican04041908-247b

PDF (244 KB)

Improved Sash Lock - p247

doi:10.1038/scientificamerican04041908-247c

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An Improved Gasoline Trap - p247

doi:10.1038/scientificamerican04041908-247d

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