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Features

The Canadian Commission's Report on the Electric Smelting of Iron Ores

A New Algol Variable

Tunneling by the Freezing Method under the East River

The Government as an Armor-Plate Manufacturer

Summer Meeting of the American Association for the Advancement of Science

By William H. Hale

The Sense of Color in Animals

A Machine that Smokes Cigars

By C. H. Claudy

The Galleys of Lake Nemi

A City of Salt

By William G. Fitz Gerald

A Railroad Collision as a Form of Amusement

An Improved Track-Sanding Device

Brake Mechanism for Vehicles

The Meredith Cigar-Vending Machine

Folding Crib

Oddities in Inventions

An Improved Parallel Ruler

Business and Personal Wants - July 14, 1906

Departments

  • Departments

    Correspondence - July 14, 1906

  • Recently Patented Inventions - July 14, 1906

  • Notes and Queries - July 14, 1906

  • New Books, Etc. - July 14, 1906

  • Patents - July 14, 1906

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July 14, 1906