Retrospect of the Year 1904 - pp2 - 3

doi:10.1038/scientificamerican01071905-2

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A Gearless Two-Speed Bicycle - p4

doi:10.1038/scientificamerican01071905-4

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A Bad Case of Gun Erosion - p4

doi:10.1038/scientificamerican01071905-4a

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New Photographic Lamp - p4

doi:10.1038/scientificamerican01071905-4b

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The Manufacture of Macaroni - p5

W. Frank M'clure

doi:10.1038/scientificamerican01071905-5

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The Largest Water Turbine in Existence - p6

doi:10.1038/scientificamerican01071905-6

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The New York Harbor Entrance - p7

Lewis M. Haupt

doi:10.1038/scientificamerican01071905-7

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The Turbine-Driven Steamer “Manxman” - p8

Emile Guarini

doi:10.1038/scientificamerican01071905-8

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The Prune and its Cultivation - pp9 - 10

Enos Brown

doi:10.1038/scientificamerican01071905-9

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The Largest Lobster on Record - p10

doi:10.1038/scientificamerican01071905-10

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The Queerest of Creatures—I - p11

J. Carter Beard

doi:10.1038/scientificamerican01071905-11

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Business and Personal Wants - p12

doi:10.1038/scientificamerican01071905-12a

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