The Blackwell's Island Bridge - p255

doi:10.1038/scientificamerican04291882-255

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Charles Darwin - p256

doi:10.1038/scientificamerican04291882-256

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The Loss of the Arctic Search Steamer Rodgers - p256

doi:10.1038/scientificamerican04291882-256a

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Aspects of the Planets for May - pp257 - 258

doi:10.1038/scientificamerican04291882-257

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New Electric Log - p258

doi:10.1038/scientificamerican04291882-258

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A Novel Sled - p258

doi:10.1038/scientificamerican04291882-258a

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New Grain Drier - p258

doi:10.1038/scientificamerican04291882-258b

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New Life Boat Plug - p259

doi:10.1038/scientificamerican04291882-259

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New Acoustic Telephone - pp259 - 260

doi:10.1038/scientificamerican04291882-259a

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Engineering Inventions - p260

doi:10.1038/scientificamerican04291882-260

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Mechanical Inventions - p261

doi:10.1038/scientificamerican04291882-261

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A New Ore Mill - p262

doi:10.1038/scientificamerican04291882-262

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Miscellaneous Inventions - p262

doi:10.1038/scientificamerican04291882-262a

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The Tile Fish - p263

Daniel C. Beard

doi:10.1038/scientificamerican04291882-263

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Jerboas, or Leaping Mice - pp263 - 265

doi:10.1038/scientificamerican04291882-263a

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Miscellaneous Inventions - pp265 - 266

doi:10.1038/scientificamerican04291882-265

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Communications Received - p267

doi:10.1038/scientificamerican04291882-267b

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