The Ideal Smokeless Powder - p18

doi:10.1038/scientificamerican01141899-18

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Failure of the Gatling Cast-Steel Gun - p18

doi:10.1038/scientificamerican01141899-18a

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Education by Correspondence - p18

doi:10.1038/scientificamerican01141899-18b

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New Suspension Bridge at Niagara - pp18 - 19

doi:10.1038/scientificamerican01141899-18c

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The Growth of Our Oil Trade - p19

William Gilbert Irwin

doi:10.1038/scientificamerican01141899-19

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A New Link Valve-Gear - p20

doi:10.1038/scientificamerican01141899-20

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A Novel Chainless Bicycle - p20

doi:10.1038/scientificamerican01141899-20a

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An Improved Rail-Joint - p20

doi:10.1038/scientificamerican01141899-20b

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The New Boston Terminal Station - pp21 - 22

doi:10.1038/scientificamerican01141899-21

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The Biograph in the Vatican - pp24 - 25

doi:10.1038/scientificamerican01141899-24

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Gunboats and Railways in the Soudan Campaign - pp25 - 26

doi:10.1038/scientificamerican01141899-25

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Damage by Spanish Shells on the Cruiser “Brooklyn” - p27

doi:10.1038/scientificamerican01141899-27

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To Inventors - p29

doi:10.1038/scientificamerican01141899-29b

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