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Pacific Railroad

India Rubber Armor

Improved Machinery for Cutting Screws

Defeat of the Amazons

Railroads of Indiana

The Panama Railroad


Eccentric Movement of the Fixed Stars

M. Orfila on Nicotine

Daguerreotypes, Machinery

The Telegraph Circuit—How the Ground Forms Part of it

Ship Building on the Ohio

Sawyer and Gwynne's Pressure Engine

Chinese at San Francisco

Bookbinding in the Olden Time

Railroad Car Ventilation—Keeping the Dust Out

New Rat Trap

New Bolt Heading and Screw Cutting Machine

Machine for Boring Conical Holes in Hubs

Incrustation in Boilers

Baltic Steamship

Application for an Extension of Patent

Van Brocklin's Screw Plate

A New Kind of Hemp

Value Given to Cotton in its Transformations

Receipt for Making M. de Baeuvillier's Wash Compound

Our Country

American Watered Silks

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

Does the Moon Influence the Weather?

Motive Powers—Centrifugal Force

The Moustache

Practical Remarks on Illuminating Gas

List of Patent Claims

Patent Office Report

Post Office Stamps

New Edition of the Patent Laws

Patent Claims

Back Numbers and Volumes

Maryland Mechanics' Institute

Necrology for the Last Half Century—Men of Science


Inventors and Manufacturers



  • From the Editor

    To Correspondents

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July 12, 1851

20% Sitewide for President's Day