Edison Dynamo Electric Light Machine - p223

doi:10.1038/scientificamerican10131883-223

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Obach's Galvanometers - p223

doi:10.1038/scientificamerican10131883-223a

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Natural History in Public Schools - p224

doi:10.1038/scientificamerican10131883-224

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The Making of Steel Pens - p224

doi:10.1038/scientificamerican10131883-224a

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Marengo Cavern - p225

H. C. Hovey

doi:10.1038/scientificamerican10131883-225

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Petroleum for Heat - pp225 - 226

doi:10.1038/scientificamerican10131883-225a

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Automatic Circuit Closer - p226

doi:10.1038/scientificamerican10131883-226

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Counterbalance - p226

doi:10.1038/scientificamerican10131883-226a

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Novel Sewing Machine Shuttle - p226

doi:10.1038/scientificamerican10131883-226b

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Fire Arm - p227

doi:10.1038/scientificamerican10131883-227

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Deep Rock Cuts Near New York - p227

doi:10.1038/scientificamerican10131883-227a

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Wagon Tongue Support - p227

doi:10.1038/scientificamerican10131883-227b

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The Cable Cars of the Brooklyn Bridge - p230

doi:10.1038/scientificamerican10131883-230

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The Crowned Pigeon - pp231 - 232

doi:10.1038/scientificamerican10131883-231

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The Champion Steam Trap - p232

doi:10.1038/scientificamerican10131883-232

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Pole and Shaft for Vehicles - pp232 - 233

doi:10.1038/scientificamerican10131883-232a

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Engineering Inventions - p234

doi:10.1038/scientificamerican10131883-234

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Mechanical Inventions - p234

doi:10.1038/scientificamerican10131883-234a

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Agricultural Inventions - p234

doi:10.1038/scientificamerican10131883-234b

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Miscellaneous Inventions - p234

doi:10.1038/scientificamerican10131883-234c

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