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The Alleghany Bridge at Pittsburgh, Pa, Selecting Durable and Perishable Timber

Scientific Intelligence- June 18, 1870

The Scorpion

By Edward C. H. Day

Achenbach's Rein Holder

Hotte's Improved Coffeepot

Conduction and Convection of Heat

The School of Mines, Columbia College

Potash from Feldspar

Molecular Motion

A New Alkaloid in Opium

The Mystery of Sleep

Primary School Education

Are Tin Fruit Cans a Source of Metallic Poisoning?

Cincinnati Industrial Exhibition

Thirty-Ninth Industrial Exhibition of the American Institute

Patent Office Affairs- June 18, 1870

New Mechanical Movements

Answers to Correspondents- June 18, 1870

Recent American and Foreign Patents- June 18, 1870

Official List of Patents- June 18, 1870

Applications for the Extension of Patents- June 18, 1870


  • Letters

    Correspondence- June 18, 1870

  • Recommended

    New Books and Publications- June 18, 1870

  • Departments

    Business and Personal- June 18, 1870

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June 18, 1870