Hotchkiss's Atmospheric Forge Hammer - pp209 - 211

doi:10.1038/scientificamerican10011864-209

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Die Engraving, Sinking and Multiplying - pp211 - 212

J. Newton

doi:10.1038/scientificamerican10011864-211

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Oil Entering a Steam Cylinder Against Pressure - p212

doi:10.1038/scientificamerican10011864-212

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Commodore Farragut's Report of the Action in Mobile Bay - pp212 - 213

doi:10.1038/scientificamerican10011864-212a

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Polytechnic Association of the American Institute - p213

doi:10.1038/scientificamerican10011864-213

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The One Thousand-Pounder Cannon - p213

doi:10.1038/scientificamerican10011864-213a

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The Power Required to Start a Train - pp214 - 215

doi:10.1038/scientificamerican10011864-214a

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Miscellaneous Summary - pp215 - 216

doi:10.1038/scientificamerican10011864-215

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A Seed-Bag - p216

doi:10.1038/scientificamerican10011864-216

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Ross's Lubricator - p216

doi:10.1038/scientificamerican10011864-216a

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Invidious Comparisons - p217

doi:10.1038/scientificamerican10011864-217

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A Battery of 15-Inch Guns - p217

doi:10.1038/scientificamerican10011864-217a

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The Moisture an a Lamp Chimney - p217

doi:10.1038/scientificamerican10011864-217b

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A New Light for Manufactories - p217

doi:10.1038/scientificamerican10011864-217c

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Cooper Union—Free Night School of Science and Art - pp217 - 218

doi:10.1038/scientificamerican10011864-217d

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Recent American Patents - p218

doi:10.1038/scientificamerican10011864-218

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Patent Claims - pp218 - 221

doi:10.1038/scientificamerican10011864-218b

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To our Readers - pp222 - 224

doi:10.1038/scientificamerican10011864-222a

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