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

Harrison Steam-Boiler

Editorial Summary

Gold Hunting and Geology

Our Navy--One Step in the Right Direction

Why a Belt Runs on the Largest Diameter of a Pulley

Science Familiarly Illustrated

Harris and Browning's Spring Friction Nuts

Recent American and Foreign Patents

New Publications

Answers to Correspondents

Probable Influence of the Internal Revenue Laws Upon Invention

Advantages of a Practical Knowledge of Mechanics to Inventors


The Management of Boilers--Explosions

A Grammatical Problem


Patentees at the French Exhibition

British Steamships and Marine Engines

Patent Claims

How to Obtain Patents

A Superior Cap for Mucilage Bottles


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