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Features

Pipe Galleries in the New Subway

Alternative Schemes for the Panama Canal

Electro-Technical Industries

By George E. Walsh

We Should Use the Metric System

Some Costly Eggs

By Arthur H. J. Keane

Floating Depot for Coaling Warships

By Day Allen Willey

Proposed Excavation of the Panama Canal by Floating Dredges

A Rational Method of Cooling Gas-Engine Cylinders

By S. M. Howell

Bromelia Fiber

By Charles Richards Dodge

A Chair Designed for the Prevention of Seasickness

A New Composing Machine

Historical Photograph from the Sea of Japan

An Improved Form of Telephone Instrument

Improved Cushion Sole for Shoes

Clothes-Line Support

Adjustable Window Ventilator

Business and Personal Wants - January 20, 1906

Departments

  • Departments

    Correspondence - January 20, 1906

  • Recently Patented Inventions - January 20, 1906

  • Notes and Queries - January 20, 1906

  • Index of Inventions - January 20, 1906

  • New Books, Etc. - January 20, 1906

  • Patents - January 20, 1906

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January 20, 1906

Complex Causes. Alternative Solutions.