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Features

Speed in Our New Navy

The Illinois State Building at the World's Fair

The Patent Centennial Celebration-April 8, 9, And 10

A Hanger for Picture or Mirror Frames

How Stocks of Pig Iron are Held

Improved Cloth Pressing Machine

The Darragh Water Filter

A Card-Board Making Machine

Scientific American Building Edition—April 18, 1891

To Inventors- April 18, 1891

List of Books on Electricity—April 18, 1891

Departments

  • Letters

    Correspondence- April 18, 1891

  • Recommended

    New Books and Publications- April 18, 1891

  • Departments

    Recently Patented Inventions- April 18, 1891

  • Business and Personal- April 18, 1891

  • Notes and Queries- April 18, 1891

  • Index of Inventions- April 18, 1891

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April 18, 1891

Think Outside the Gift Box