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Features

Beck's New Improved Self-Adjusting Vise

On the Conditions and Limits Which Govern the Proportions of Rotary Fans

The Cockchafer and its Ravages

By Edward C. H. Day

The Roller Barrow

A Chapter on Cockroaches

By John R. Gordon

Scientific Periodicals Found in New York Libraries

By H. Carrington Bolton

Balloon Varnishes

By John Wise

New Sugar Refining Process

The Origin of the Reluctance with Which Mankind Receive New Ideas and Inventions

The Metropolitan Museum of Art

Recent Foreign Improvements

The Question of City Transit

Something about Horseshoes

Scientific Intelligence- June 11, 1870

A Pneumatic Tube Four Hundred Miles Long

Reduction of the Public Debt

National Exhibition of the Argentine Republic

Georgia State Fair

Answers to Correspondents- June 11, 1870

Recent American and Foreign Patents- June 11, 1870

Patent Office Affairs- June 11, 1870

Official List of Patents- June 11, 1870

Departments

  • Letters

    Correspondence- June 11, 1870

  • Departments

    Business and Personal- June 11, 1870

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June 11, 1870

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