Skip to main content


Prevention Better than Cure

The Annual Report of the Commissioner of Patents for the Year 1893

A Heating Gas Burner

The Baltimore Traction Company

An Improved Wrench

Friedburg's Bunsen Burner

Steam Tramcars with Serpollet's Boiler

Reid's "Lightning" Brace

Improved Journal Box Supports


A Practical Steam Stamp Mill

Substitute for Pipe Tongs

Very High Windmill

Manufacture of Smoking Tobacco

To Inventors - April 7, 1894


  • Letters

    Correspondence - April 7, 1894

  • Recommended

    New Books and Publications - April 7, 1894

  • Departments

    Recently Patented Inventions - April 7, 1894

  • Business and Personal - April 7, 1894

  • Index of Inventions - April 7, 1894

  • Notes and Queries - April 7, 1894

Purchase To Read More

Already purchased this issue? Sign In to Access
Select Format
April 07, 1894

See the World from a Different Perspective

Subscribe to Scientific American MIND