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Features

Advance of Polar Exploration

Art and Photography

Carr's Improved Combination Surface Gauge

An Improved Brick Machine

How Horse Trotting Improves

A Watchman's Electric Time Recorder

The Austin, Texas Dam

Lightning Full Mounted Screw Plates

Improved Reaping, Thrashing, and Bagging Machine

The Study of the Stars

By A. E. Beach

A Field Glass Camera

Communications Received

Departments

  • Letters

    Correspondence- September 24, 1892

  • Departments

    Recently Patented Inventions- September 24, 1892

  • Business and Personal- September 24, 1892

  • Index of Inventions- September 24, 1892

  • Notes and Queries- September 24, 1892

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September 24, 1892

Complex Causes. Alternative Solutions.