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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 Roller Barrow

The Cockchafer and its Ravages

By Edward C. H. Day

Scientific Periodicals Found in New York Libraries

By H. Carrington Bolton

A Chapter on Cockroaches

By John R. Gordon

Balloon Varnishes

By John Wise

The Metropolitan Museum of Art

New Sugar Refining Process

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

Something about Horseshoes

Recent Foreign Improvements

Scientific Intelligence- June 11, 1870

The Question of City Transit

A Pneumatic Tube Four Hundred Miles Long

Georgia State Fair

National Exhibition of the Argentine Republic

Reduction of the Public Debt

Patent Office Affairs- June 11, 1870

Recent American and Foreign Patents- June 11, 1870

Answers to Correspondents- 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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Why Do Facts Fail?

Why Do Facts Fail?

Deconstructing Denial