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Features

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

A Prize for Everybody

How Trains are Moved by Telegraphic Signals

The Manatee: The Human Fish

By I. Cantini

The Asserted Superiority of the Right Hand

The Suez Canal

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

A Remedy for Strikes

The Rights of the Government and Patentees

The Spanish Gunboats

Men of Progress: —Celebrated American Inventors

New Publications

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

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

Answers to Correspondents

Patent Decision

Recent American and Foreign Patents

Official List of Patents

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December 18, 1869

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