Proposed New System of Waterworks for Chicago - p399

doi:10.1038/scientificamerican12241881-399

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A Glance Backward and Forward - p400

doi:10.1038/scientificamerican12241881-400

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Patents as Investments - pp400 - 401

doi:10.1038/scientificamerican12241881-400a

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Vibration of Railway Bridges - p401

doi:10.1038/scientificamerican12241881-401

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Naval and Coast Defense - pp401 - 402

doi:10.1038/scientificamerican12241881-401a

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Pig Iron Breaker - p402

doi:10.1038/scientificamerican12241881-402

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Improved Shaft Coupling - p402

doi:10.1038/scientificamerican12241881-402a

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Experimental Boiler Explosion - p403

doi:10.1038/scientificamerican12241881-403

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Mechanical Inventions - pp403 - 404

doi:10.1038/scientificamerican12241881-403a

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Decisions Relating to Patents - p404

doi:10.1038/scientificamerican12241881-404

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Steam Boiler Notes - p405

doi:10.1038/scientificamerican12241881-405

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New Worm and Worm Wheel and Gear Cutter - p406

doi:10.1038/scientificamerican12241881-406

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Engineering Inventions - p406

doi:10.1038/scientificamerican12241881-406a

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Dynamic Electricity - p407

Geo. M. Hopkins

doi:10.1038/scientificamerican12241881-407

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The Flying Squirrel - p409

R. W. Seiss

doi:10.1038/scientificamerican12241881-409

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The Tape Worm - p409

doi:10.1038/scientificamerican12241881-409a

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Miscellaneous Inventions - p409

doi:10.1038/scientificamerican12241881-409b

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