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Features

Twenty Inch Smooth Bore Gun for the Russian Government

Marine Casualties

Official Publication of the American Patents--A New and Important Work

The California Diamond Bubble

Revival of American Shipbuilding

The Proposed Half Million Grab

Electricity at the Stevens Institute.--Novel Researches by Professor Morton Concerning the Induced Current

Improved Ship's Compass

The Christian Leader

Death of Horace Greeley

The November Atmospheric Wave

Improved Seed Planter

Steam Boiler Explosions

Combined Tool

How to Make Paper Caps

New Ice Harvesting Invention

Head Block for Saw Mills

Transmission of Motion

The Sturtevant Blower and Its Uses

How a Vessel Sails Against the Wind

Improved Hot Blast Oven

The Buildings of the Vienna Exposition

How to Make Money by Patents

Patent Office Decisions

New Fireproof Construction

Decisions of the Courts

Answers to Correspondents

Recent American and Foreign Patents

Value of Patents, and How to Obtain Them

Practical Hints Inventors

Patent Cold Rolled Shafting

Departments

  • Departments

    Correspondence

  • Notes and Queries

  • Business and Personal

  • Index of Inventions

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December 14, 1872

Complex Causes. Alternative Solutions.