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Can Duplex Craft Speed Up Transportation?, New York's Greatest Handicap and more

By Robert G. Skerrett

The Ingenuity of the Watchmaker

Some of the Methods and Tools That Make This Trade Rank as a Profession

By Robert F. Nattan

Exploiting the Inventor--IV

A Few of the Good Old Stand-Bys Employed in the Promotion of Stock Frauds Based on "Inventions"

By C. H. Claudy'

Subduing the Boll Weevil

At Last a Successful Means of Dealing with the Worst Present Mexico Ever Made Us.

By George H. Dacy

The House on the Hill with Front Door in the Valley

By John L. Von Blon

Development of American Clays

By S. R. Winters

Annealing with Gas

The Ways, Means and Results of This Often-Mentioned Process

By W. A. Ehlers

Air Bags for the Airplane that Lands on Water

By George Gaulois

What Europe is Doing in Aviation--Americans, Please Take Notice!

By Erie A. Dime

The Backbone of Naval Power

British Confidence in the Battleship as Exemplified in the "Hood"

By Hector C. Bywater

Keeping the Construction Laborer Satisfied

By Allen P Child

The Fuel Case of Coke vs. Coal

By Henry Townsend

The Steamship Pier Problem

Considerations Which Governed the Design of the Twelve New Staten Island Piers

The Automatic Substation from an Economic Standpoint


  • Departments

    Correspondence - May 1, 1920

  • Inventions New and Interesting - May 1, 1920

  • Recently Patented Inventions - May 1, 1920

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