Ducker's Portable Barrack and Field Hospital - p399

doi:10.1038/scientificamerican06261886-399

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The Benefits of the Patent Laws - p400

doi:10.1038/scientificamerican06261886-400

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Car Builders Perplexed About Car Couplers - pp400 - 401

doi:10.1038/scientificamerican06261886-400a

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A Transcontinental Balloon Voyage - p401

doi:10.1038/scientificamerican06261886-401

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Electric Lighting as an Investment - p401

doi:10.1038/scientificamerican06261886-401a

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Photographic Notes - pp401 - 402

doi:10.1038/scientificamerican06261886-401b

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Improved Hand Truck - p402

doi:10.1038/scientificamerican06261886-402

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Improved Tool Grinder - p402

doi:10.1038/scientificamerican06261886-402a

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A New Hand Truck - p402

doi:10.1038/scientificamerican06261886-402b

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Muffler for Steam Valves - p402

doi:10.1038/scientificamerican06261886-402c

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Feeding Stand for Poultry - p402

doi:10.1038/scientificamerican06261886-402d

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New Power Punching Presses - p403

doi:10.1038/scientificamerican06261886-403

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Boiler Feeder - p403

doi:10.1038/scientificamerican06261886-403a

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The Spheroidal State of Water - p404

T. O'conor Sloane, Ph.D

doi:10.1038/scientificamerican06261886-404

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Wood Wool - p406

doi:10.1038/scientificamerican06261886-406

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Prismatic Gunpowder - pp406 - 407

doi:10.1038/scientificamerican06261886-406a

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The Water Buck - p407

doi:10.1038/scientificamerican06261886-407

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A Hairy Elephant - p408

doi:10.1038/scientificamerican06261886-408

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Engineering Inventions - p409

doi:10.1038/scientificamerican06261886-409

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Miscellaneous Inventions - p409

doi:10.1038/scientificamerican06261886-409a

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To Inventors - p409

doi:10.1038/scientificamerican06261886-409e

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