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Lathe for Turning Billiard Balls

Remarks on the Subject of Force in General

By John A. Roebling

Books and Publications

Wrought-Iron Guns

Report of the Committee of the Franklin Institute on Screw Threads

Count Rumford

Asparagus a Substitute for Coffee

Goessling's Corn-Sugar Patents

Cementation of Iron by Carbon from Gas Retorts

Medals for Inventors in France

Allen's Supporter for Fractured Legs

The Pressure on a Slide Valve

The Report on Screw Threads

Important English Patent Law Case

The Field of Invention Inexhaustible

Patent Claims

Issued from the United States Patent-Office

Recent American Patents

Market for the Month

Fitzpatrick' Perpetual Time Indicator


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  • Notes & Queries

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