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Scientific American Magazine Vol 90 Issue 23

Scientific American Magazine

Volume 90, Issue 23

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Features

Submarine Mines on the High Seas

The N-Rays: Are They Real or Illusory?

A World's Congress of Academies

Charles H. Haswell's Ninety-Fifth Birthday

Belgian and American Electric Lifting Magnets

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

W. Frank M'clure

The Petroleum Reservoirs of California

H. A. Crafts

An Arcade for New York City

Wreck of the Russian Cruiser Bogatyr

The Pielock Superheater System

Alfred Gradenwitz

Photography of Jupiter's Satellites

Improved Railway Chair

Patent Department

Compensating Device for Rope Tramways

A Novel Fly-Catcher

Rock Drill Attachment

A Tension Regulator for Overhead Cables

An Improved Portable Tent

Device for Distributing Noxious Fumes

A Clothing Rack

Business and Personal Wants

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