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Regulating Wireless Telegraphy, Dr. Wiley's Resignation and more

How Detective Burns Listened to Dynamiter Plots

Instruments That Can be Used for Eavesdropping or for Business Purposes

Piercing the Jungfrau Tunnel

A Remarkable Engineering Feat in the Swiss Alps

By Alfred Gradenwitz

The New Notions of Matter

By John W. N. Sullivan

The Last of the "Maine"

A Fitting Burial at Sea

A Princely Gift for Technical Education

What the $2,500,000 Donation to the Massachusetts Institute of Technology Means

By John Ritchie

The Laboratory

Some Suggestions for Home Experiment

By Claude C. Kiplinger

An Electric Furnace

By R. H. Crowyn

What Inventors are Doing

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

A Professional Inventor

By William Atherton Du Puy

The World's Fleets--Enormous Increases, Requirements for Military Aeroplanes and Aviators and more


  • Recommended

    New Books, Etc. - March 30, 1912

  • Departments

    Correspondence - March 30, 1912

  • The Heavens in April - March 30, 1912

  • Recently Patented Inventions - March 30, 1912

  • Notes and Queries - March 30, 1912

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