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New System of Aero-Locomotion, Sodium--A Scientific Canard

Harrison Steam-Boiler

Editorial Summary

Gold Hunting and Geology

Why a Belt Runs on the Largest Diameter of a Pulley

Our Navy--One Step in the Right Direction

Science Familiarly Illustrated

Harris and Browning's Spring Friction Nuts

Recent American and Foreign Patents

Answers to Correspondents

New Publications

A Grammatical Problem

The Management of Boilers--Explosions

Probable Influence of the Internal Revenue Laws Upon Invention

Patentees at the French Exhibition

Credit

Caution

Advantages of a Practical Knowledge of Mechanics to Inventors

British Steamships and Marine Engines

Patent Claims

How to Obtain Patents

A Superior Cap for Mucilage Bottles

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March 30, 1867

See the World from a Different Perspective

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