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Pump Valve

The Deepest Well in The World

Artesian Wells in California

Witting's Improved Cotton Press

More Sorgho Sugar

Drawing Cotton, Etc.

Patent Rights and the Lobby at Washington

Nitrogen—Its Utility

Improved Ironing Table

Improvements in Fire-Arms

Improved Elastic Railroads

Daniel's Improved Water Wheel

The American Patent System

Forty-three Millions

Lap-Welded Iron Tubes

Salt for Plum Trees

Paine's Wonderful New Discovery

The “Leviathan” Afloat

Abstract of the New Patent Bill

Heich's Egg-Beater


Artificial White Light

Improved Coin Balance

Science in Sport

Special Legislation on Patents


  • Letters

    Correspondents - February 27, 1858

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