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A Gaseous Earth and the Space it Would Occupy, Rebuilding Europe with the Tank-Derrick and more

Multiple Production--A New Slogan

The Necessity for Getting the Most Out of a Given Quantity of Raw Material by Finding Uses for All of It

By R. G. Skerrett

Some Phases of Reconstruction

A Contrast between the Problems it Presents to Europe and to America

By William C. Redfield

A Competitor for Acetylene

Newly Developed Cutting Gas with Striking Properties

The Alaskan Railways

How Construction and Operation Stand Today in Our Northern Territory

By J. F. Springer

The Vacuum Tube--An Electrical Acrobat

What it is: What it Does: Who Uses it and How: What it may do in the Future

By Pierre H. Boucheron

Patent Office Facts

Some Instances of the Condition to which Lack of Funds has Reduced this Bureau


  • Departments

    Correspondence - January 17, 1920

  • The Service of the Chemist - January 17, 1920

  • The Motor-Driven Commercial Vehicle - January 17, 1920

  • Recently Patented Inventions - January 17, 1920

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