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Progress of the Great Suspension Bridge Between New York and Brooklyn

Corn as Fuel

Intolerance among Physicians

Humanity Versus Fanaticism

Plea for a Government Perpetual Motion

How to Get Rid of Foundlings

Extinguishing Petroleum with Chloroform

Novel Oil Separator

Miscellaneous Inventions - May 21, 1881

Novel Car Cooler

The Gamgee Perpetual Motion

Novel Washing Machine

Engineering Inventions - May 21, 1881

A Simple Filter Pump

By John Eitel

Novel Candlestick

New Telephone Transmitter

The Lemur Vari

Communications Received - May 21, 1881


  • Departments

    Business and Personal - May 21, 1881

  • Notes and Queries - May 21, 1881

  • New Books and Publications - May 21, 1881

  • Index of Inventions - May 21, 1881

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May 21, 1881

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