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Pump Valve

More Sorgho Sugar

Witting's Improved Cotton Press

Artesian Wells in California

The Deepest Well in The World

Drawing Cotton, Etc.

Improved Ironing Table

Nitrogen—Its Utility

Patent Rights and the Lobby at Washington

Daniel's Improved Water Wheel

Improved Elastic Railroads

Improvements in Fire-Arms

The American Patent System

Salt for Plum Trees

Forty-three Millions

Paine's Wonderful New Discovery

Lap-Welded Iron Tubes

The “Leviathan” Afloat

Abstract of the New Patent Bill

Heich's Egg-Beater


Improved Coin Balance

Special Legislation on Patents

Science in Sport

Artificial White Light


  • Letters

    Correspondents - February 27, 1858

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