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To Kill Rats

How to Exterminate Roaches

New Route to California

Cracker and Biscuit Rolling and Cutting Machine

Pacific Rail Road

To Get Rid of Grain Weevils

Pennsylvania Railroad

Bellefontalne and Indiana Railway

Cave in California

Cure for Cancer

Steamboat Boilers

Charcoal for Cisterns

Destitution in Glasgow, Scotland

Indestructibility of Enjoyment

Stone Cavalry

Liquid Gold

Subterranean Lake at Lancaster

Telegraph Profits

Maryland Institute

The Atlantic

The Census Law for 1850

The Descendants of Robert Burns

Old Rice

Colonel Fremont

Old Tan Bark

Parsnips for Pigs

Death from a Pin

Death of a Great Man

Prospects of the Wool Trade for 1850

Western Giants

Philosophy of Mechanics

Table of the Board Measure of Logs

The Patent Office and Reform of the Patent Laws

The Use of Oxide of Zinc is not Injurious to Health

Self-Adjusting Churn

Improvement on Hanging Brakes for Railroad Cars and other Machinery

Ingram's Improved Water Closet

New Kind of Black Ink

New Serving Mallet for Riggers


Oil Stone

Tight Pantaloons and Tobacco

Proposed New Description of Railway

Splendid Present

Light and its Effects—Gothic Churches

New American Coins

Patent Case—India Rubber Pontoon Boat


Propeller Improvements

The Solvent Properties of Caloric, Similar to Acid Gases

John Bull Turning Yankee

List of Patent Claims

Useful Statistics



Mathematics of Bees

Inventors and Mechanics

History of Propellers and Steam Navigation

Divisibility of Matter


  • From the Editor

    To Correspondents

  • Letters

    Important Notice To Us!

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June 15, 1850

20% Sitewide for President's Day