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Sinking Screw Piles, Acid Rivers and more

The Celebrated Crosse Experiments

Railway Carriages in Different Parts of the World

The Toad as an Entomologist

By A. S. Ritchie

Smith's Improved Corn Sheller

The Ejector Condenser

How Trains are Moved by Telegraphic Signals

A Prize for Everybody

The Manatee: The Human Fish

By I. Cantini

A Remedy for Strikes

The Suez Canal

The Asserted Superiority of the Right Hand

Causes and Prevention of Fires.—The Metro-Politan Fire Department

The Rights of the Government and Patentees

The Spanish Gunboats

Men of Progress: —Celebrated American Inventors

New Publications

Announcement for 1870.—A Splendid Work of Art and Cash Premiums to be Given

Report of the Judges of Department of Steam Engineering at the American Institute Fair

Recent American and Foreign Patents

Patent Decision

Answers to Correspondents

Official List of Patents


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