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Features

Improved Portable Elevator and Conveyer

Reclaiming the Desert Places

A Neglected Source of Food

The Astronomical Conditions of Life

Pumping Engine Economy

Improvements in Sugar Making

The Separation of Tar and the Manufacture of Sulphate of Ammonia from Waste Products

Recent Boiler Explosions

Scientific and Practical Information - April 25, 1874

Munson's Improved Lightning Rod

Improved Grate Clearing Attachment

The Shaker Sash Balance

Modern American Lighthouses

Importance of Advertising

Recent American and Foreign patents - April 25, 1874

Answers to Correspondents - April 25, 1874

Communications Received - April 25, 1874

Canadian Patents - April 25, 1874

LIST OF PATENTS GRANTED IN CANADA, MARCH 27, 1874.

Departments

  • Recommended

    New Books and Publications - April 25, 1874

  • Departments

    Business and Personal - April 25, 1874

  • Index of Inventions - April 25, 1874

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April 25, 1874

Think Outside the Gift Box