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Pacific Railroad

Defeat of the Amazons

India Rubber Armor

Railroads of Indiana

The Panama Railroad

Improved Machinery for Cutting Screws

M. Orfila on Nicotine


The Telegraph Circuit—How the Ground Forms Part of it

Daguerreotypes, Machinery

Eccentric Movement of the Fixed Stars

Ship Building on the Ohio

Sawyer and Gwynne's Pressure Engine

Chinese at San Francisco

Bookbinding in the Olden Time

New Bolt Heading and Screw Cutting Machine

Railroad Car Ventilation—Keeping the Dust Out

Baltic Steamship

Value Given to Cotton in its Transformations

Receipt for Making M. de Baeuvillier's Wash Compound

Application for an Extension of Patent

Incrustation in Boilers

New Rat Trap

A New Kind of Hemp

Machine for Boring Conical Holes in Hubs

Van Brocklin's Screw Plate

Does the Moon Influence the Weather?

Our Country

Motive Powers—Centrifugal Force

Coal the Cause of England's Greatness—The Future Greatness of the United States

American Watered Silks

The Moustache

List of Patent Claims

Practical Remarks on Illuminating Gas

Patent Office Report

Back Numbers and Volumes

Post Office Stamps

Patent Claims

New Edition of the Patent Laws

Necrology for the Last Half Century—Men of Science



Inventors and Manufacturers

Maryland Mechanics' Institute


  • From the Editor

    To Correspondents

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July 12, 1851

Of Shamrocks and Science

Happy St. Patrick’s Day