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The "Human Interest" at Panama, Merchant Marine a National Issue and more

Our Latest Battleships, the "Nevada" and "Oklahoma"

The Most Powerfully Protected Ships Yet Designed

An Important Development of the Steam Engine

Superheat as an Element of Efficiency

By Warren H. Miller

Four-dimensional Space

Its Application to Practical Problems

By E. L. Du Puy

A Mechanical Violin Player

How a Bow with 3,000 Horsehairs Solved a Difficult Problem

Interlined Printing for the Blind

By Walter G. Holmes

The Turret Telescope

A New Form of Mounting Adapted to the Comfort of the Observer

By S. A. Mitchell

Curiosities of Science and Invention

What Inventors are Doing

Simple Patent Law; Patent Office News; Inventions New and Interesting

Hoarding up Happiness

By Franklin O. King

Confusion of Names of Commercial Woods, One of the "Ten Stories" and more


  • Recommended

    New Books, Etc. - March 9, 1912

  • Departments

    Correspondence - March 9, 1912

  • Recently Patented Inventions - March 9, 1912

  • Notes and Queries - March 9, 1912

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