Locomotive Boiler Explosion, Wallingford, Conn - p31

doi:10.1038/scientificamerican01171891-31

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Students of American History - p32

doi:10.1038/scientificamerican01171891-32

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Vital Statistics of Jews in the United States - pp32 - 33

doi:10.1038/scientificamerican01171891-32a

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The American Economic Association - p33

doi:10.1038/scientificamerican01171891-33

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An Improvised Portable Foot Bridge - p34

doi:10.1038/scientificamerican01171891-34

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A Leveler for Use on Meadow Lands, Etc. - p34

doi:10.1038/scientificamerican01171891-34a

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A Railway Car Fire Extinguishing Apparatus - p35

doi:10.1038/scientificamerican01171891-35

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An Improved Air Pump Governor - p35

doi:10.1038/scientificamerican01171891-35a

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A Compact and Powerful Flooring Clamp - p35

doi:10.1038/scientificamerican01171891-35b

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A Pen Holder to Facilitate Making Waved Lines - p35

doi:10.1038/scientificamerican01171891-35c

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A Simple and Reliable Trap - pp35 - 36

doi:10.1038/scientificamerican01171891-35d

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Photography of a Cannon Ball in Motion - p38

doi:10.1038/scientificamerican01171891-38

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The “Iron Gates” of the Danube - p38

doi:10.1038/scientificamerican01171891-38a

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Small Electric Motor for Amateurs - pp39 - 40

Geo. M. Hopkins, By

doi:10.1038/scientificamerican01171891-39

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Long Splice for Ropes - pp40 - 41

doi:10.1038/scientificamerican01171891-40

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To Inventors - p43

doi:10.1038/scientificamerican01171891-43

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Popular Books - p44

doi:10.1038/scientificamerican01171891-44

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Patents! - p45

doi:10.1038/scientificamerican01171891-45a

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The Scientific American - p46

doi:10.1038/scientificamerican01171891-46

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