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Features

A Suggested Cure of Gun Erosion

Wireless Telegraphy and Telephony in the Japanese Navy

Agriculture the True Source of Our Wealth

The Erection of the Quebec Bridge

An Improved Ozone Generator

By Charles H. Coar

A Home-Made Equatorial Mounting for Telescopes

By Carl L. Gruppen

Machines in the Elimination Race for the Vanderbilt Cup

Some Remarkable Results with Armor-Piercing Shells

An Improved Cutter Head

An Improved Window Raising and Locking Device

Business and Personal Wants

Departments

  • Departments

    The Heavens in October

  • Correspondence

  • Recently Patented Inventions

  • Index of Inventions

  • Patents

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September 29, 1906

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