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Features

Improved Stone Quarrying Machine

Explosions Due to Low Water

Proposed New Patent Law in England

Injustice to Workmen

Pseudo Science

Kircher's Remarkable Observations Concerning the Sun

Lens Fires

Scientific and Practical Information

The Siphon Recording Telegraph Instrument

The Vienna Exhibition

The Detroit River Tunnels

Curious Effect of Light on Selenium

The Strength of Timber

By John Anderson

Gin Saw Filing Machine

New Valve Gearing for Steam Engines

The Ralston Inclined Railway

The Bridal Veil, Havana Glen N. Y.

The Coffee Gardens of Arabia

The Hixson Beehive

Decisions of the Courts

Recent American and Foreign Patents

Answers to Correspondents

Communications Received

Departments

  • Departments

    Correspondence - March 29, 1873

  • Business and Personal - March 29, 1873

  • Notes and Queries - March 29, 1873

  • Index of Inventions - March 29, 1873

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March 29, 1873

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