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Submarine Mines on the High Seas

A World's Congress of Academies

The N-Rays: Are They Real or Illusory?

Charles H. Haswell's Ninety-Fifth Birthday

Belgian and American Electric Lifting Magnets

By Frank C. Perkins

Electrically-Operated Versus Steam-Driven Mine Hoists

Electrochemical Phonograph

The Japanese Naval Disasters

New form of Radiation

The Manufacture of Straw Hats

By W. Frank M'clure

The Petroleum Reservoirs of California

By H. A. Crafts

An Arcade for New York City

Wreck of the Russian Cruiser Bogatyr

Photography of Jupiter's Satellites

The Pielock Superheater System

By Alfred Gradenwitz

Compensating Device for Rope Tramways

A Novel Fly-Catcher

Rock Drill Attachment

Patent Department

Improved Railway Chair

An Improved Portable Tent

A Tension Regulator for Overhead Cables

A Clothing Rack

Device for Distributing Noxious Fumes

Business and Personal Wants

Departments

  • Departments

    The Heavens in June - June 4, 1904

  • Correspondence - June 4, 1904

  • Recently Patented Inventions - June 4, 1904

  • Index of Inventions - June 4, 1904

  • New Books, Etc. - June 4, 1904

  • Notes and Queries - June 4, 1904

  • Patents - June 4, 1904

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June 04, 1904

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