Gunboats, The Torpedo Boat Problem

Sugar Making in Louisiana

An Improved Hoisting Pulley Wanted

An Ingenious Vent Peg

Ferdinand de Lesseps--Chief Promoter of the Suez Canal

Boiler Covering

American and English Railway Practice Contrasted

Patent Decision

Girard's "Palier Glissant"

A Protest Against the Canadian Patent Law

American Railway Management

The American Institute Prizes Awarded to Steam Engines

The Suez Canal Not Yet a Failure

Tubular Boilers and Boiler Explosions

A Happy New Year!

Scientific Lectures before the American Institute

Professor Fiske's Lectures at Harvard

The Battle Fields of Science

The Brighter Side

What the Newspapers Say

How French Bank Notes are Made

Editorial Summary

A Novel French Hand Vise

The Stevens Breech-Loading Rifle

The Woven-Wire Mattress

Preservation of Iron

The Bananas and Plantains of the Tropics

Paper for Building

The Magic Lantern

Putting up Stoves

Improvement in Lamp Wicks

Answers to Correspondents

Recent American and Foreign Patents

Under this heading we shall publish weekly notes of some of the more prominent home and foreign patents.

Official List of Patents

Issued by the Untied States Patent Office. For the Week Ending Dec. 14, 1869. Reported Officially to the Scientific American.

U. S. Patent Office

How to Obtain Letters Patents NEW INVENTIONS Information about Caveats, Extensions, Interferences, Designs, Trade Marks; also, Foreign Patents.