State Laws Affecting Patents - p16

doi:10.1038/scientificamerican07091881-16

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Water Glass - pp16 - 17

doi:10.1038/scientificamerican07091881-16a

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The Stephenson Centenary - p17

doi:10.1038/scientificamerican07091881-17

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The Great Comet Now in Sight - p17

doi:10.1038/scientificamerican07091881-17a

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Novel Cattle Ringer - p18

doi:10.1038/scientificamerican07091881-18

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Improved Feed-Water Regulator - p18

doi:10.1038/scientificamerican07091881-18a

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Mechanical Inventions - pp18 - 19

doi:10.1038/scientificamerican07091881-18b

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Improved Wagon Spring - p19

doi:10.1038/scientificamerican07091881-19

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Improved Air Pump - p19

doi:10.1038/scientificamerican07091881-19a

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Explosion of a Plain Cylinder Boiler in Philadelphia - p20

S. N. Hartwell

doi:10.1038/scientificamerican07091881-20

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Recent Decisions Relating to Patents - p20

doi:10.1038/scientificamerican07091881-20a

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An Interesting Boiler Experiment - p21

doi:10.1038/scientificamerican07091881-21

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Improved Car Truck - p22

doi:10.1038/scientificamerican07091881-22

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Expansion Voltameter - pp22 - 23

M. Hopkins

doi:10.1038/scientificamerican07091881-22a

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The Electric Boat - p23

doi:10.1038/scientificamerican07091881-23

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The Faure Battery-Stored-Up Electricity - pp23 - 24

doi:10.1038/scientificamerican07091881-23a

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The Prospects and Present State of Photo-Graphy in Natural Colors - p25

doi:10.1038/scientificamerican07091881-25

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Communications Received - p27

doi:10.1038/scientificamerican07091881-27

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