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Corrosion of Steam Boilers

New Method of Gold Extraction from Pyrites Used in Italy

How Long Must We Suffer Our Engineering Department at Present the Creature of Party Politics

Borax, and Food

A Novel Air Compressor

An Apparatus for Preventing Seasickness

By Alfred Gradenwitz

The Plans for the New Manhattan Bridge

The New White Star Liner "Baltic" --the Largest Vessel in the World

By the English Correspondent of the Scientific American

Lensless Photography

By N. R. Briggs

Cascades and Colonnade of States at the Exposition

By the St. Lousis Correspondent of the Scientific American

A Compensating Windmill

Voting Machine

The New Australian Patent Act

Chain Clamp

Improved Gage

Grain Lifter for Headers

Hose or Pipe Coupling

Ventilated Eye-Shade

Business and Personal Wants


  • Departments

    Correspondence - July 16, 1904

  • Recently Patented Inventions - July 16, 1904

  • New Books, Etc. - July 16, 1904

  • Notes and Queries - July 16, 1904

  • Index of Inventions - July 16, 1904

  • Patents - July 16, 1904

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