Improved Steam Boiler, Locomotive Boilers - pp15 - 16

doi:10.1038/scientificamerican07071866-15

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Why a Gun becomes Hot on Firing - p16

Charles A. Seely

doi:10.1038/scientificamerican07071866-16

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The Spectroscope and Its Revelations - pp17 - 18

Henry Draper

doi:10.1038/scientificamerican07071866-17

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McDonough's Caloric Engine - p19

doi:10.1038/scientificamerican07071866-19

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Christian's Device for Oil Wells - p19

doi:10.1038/scientificamerican07071866-19a

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Law Applicable to Reissue of Letters Patent - p21

doi:10.1038/scientificamerican07071866-21a

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New Publications - p21

doi:10.1038/scientificamerican07071866-21b

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Special Notices - pp21 - 22

doi:10.1038/scientificamerican07071866-21c

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Olmsted's Patent Drill Chuck - p22

doi:10.1038/scientificamerican07071866-22

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Educated Mechanics - p23

doi:10.1038/scientificamerican07071866-23

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Free and Easy Legislation on Patents - p23

doi:10.1038/scientificamerican07071866-23a

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A Four-Tool Planer - p23

doi:10.1038/scientificamerican07071866-23b

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A Just Measure - pp23 - 24

doi:10.1038/scientificamerican07071866-23c

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Patent Claims - pp24 - 30

doi:10.1038/scientificamerican07071866-24

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