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Features

Reduction of Fare on the Baltimore and Ohio Railroad

New Iron Bridge

Safety Valves in Steamboats

Turning Lathe Improvements

The State Fair

Railroad Jubilee

Foreign Correspondence

Mode of Calculating River Velocity

The Lion's Tongue

Rhode Island Fair—Paine's Light

Planing Machine

Boston Science

Science and Arts, Improvements &C

Great Swimmer

Air Spring for Cars

Great Exhibition—American Inventions

A Great Salt Well

Improved Lamp for Burning Camphene

Improvements in Expanding Mandrils

Improved Engine Lathe

Improved Water Indicator

Improved Rotary Blower

New Way of Fastening Scythes

Improved Machinery for Cutting Shoemakers Jiggers, Spur rowels, &C

Cast Iron Fronts of Houses

New Vault Lights

Improved Machine for Making Combs

Interesting Patent Case—Steam Pump

Patent Office Report for 1850—No. 2

Reclaiming Rice Fields

Parker's Wheels

Utility of American Inventions

Remarks on the Manufacture of Starch and British Gum

Haviland & Tuttle's Centre Vent Iron Wheels

Tilton's Violin

More Gold

List of Patent Claims

Back Numbers and Volumes

Patent Claims

New Edition of the Patent Laws

Postage on Books

The Rotary Experiment

Submarine Explosion

Sound

Petrifactions in Arkansas

New Prospectus

Inventors and Manufacturers

Departments

  • From the Editor

    To Correspondents

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