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The Imperfect Definition of the Photographic Image on Dry Plates

Dangers of Peddled Ice Cream

Early Use of the Water-Tube Locomotive Boiler

Fireproof Mail Cars

The Expansion of our Foreign Commerce

Inspection of Gas Meters

By Alton D. Adams

Progressive-Motion Ore-Conveyer

Hygienic Mechanical Bread-Making

Sinking the Caissons for East River Bridge No. 3


Cynips Polycera

By M. C. Frederick

Railroads in Cuba

By Waldon Fawcett

The Nice-Turbie Race

By Our Paris Correspondent

An Oscillating Compound Steam Engine of Novel Design


Friction Clutch Pulley

Wave and Tide Motor

The Nation's Baskets

Business and Personal Wants


  • Departments

    The Heavens in June

  • Index of Inventions - May 31, 1902

  • Recently Patented Inventions - May 31, 1902

  • New Books, Etc. - May 31, 1902

  • Notes and Queries - May 31, 1902

  • Patents - May 31, 1902

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