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Improvement in Railroad Switches

The French Atlantic Telegraph

From Chambers' Journal

The Manufacture of Sulphuric Acid

By J. Lawrence Smith

The Niagara Elevator at Buffalo

Some Experiments with the Great Induction Coil at the Royal Polytechnic

By John Henry Pepper

“Fast” Methods of Telegraphy

The Use of Counter-Pressure Steam in The Locomotive Engine as a Brake

How Mahogany is Obtained

Organic and Inorganic Substances

The Exhibition of the American Institute

The Velocipedes Out Again

The Watering of the Streets of New York with Sea Water

New Facts About the Formation of Deposits in Steam Boilers

The Preservation of Iron

Progress of American Woolen Manufactures

Great Value of Patents

Obituary—Charles B. Hutchinson

Answers to Correspondents

Applications for Extension of Patents

Recent American and Foreign Patents

Under this heading we shall publish weekly notes of some of the more prominent home andforeign patents.

Official List of Patents

Manufacturing, Mining, and Railroad Items

New Publications


  • Departments


  • Business and Personal

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Why Do Facts Fail?

Why Do Facts Fail?

Deconstructing Denial