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Progress of the Great Suspension Bridge Between New York and Brooklyn

Humanity Versus Fanaticism

Corn as Fuel

Intolerance among Physicians

Extinguishing Petroleum with Chloroform

How to Get Rid of Foundlings

Plea for a Government Perpetual Motion

Miscellaneous Inventions - May 21, 1881

Novel Oil Separator

Novel Car Cooler

The Gamgee Perpetual Motion

Engineering Inventions - May 21, 1881

Novel Washing Machine

A Simple Filter Pump

By John Eitel

New Telephone Transmitter

Novel Candlestick

The Lemur Vari

Communications Received - May 21, 1881


  • Departments

    New Books and Publications - May 21, 1881

  • Business and Personal - May 21, 1881

  • Notes and Queries - May 21, 1881

  • Index of Inventions - May 21, 1881

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