Scientific American, December 29, 1855. Franklin's great discovery; etc

Features

Goulding's Patent Rock Drill

Moss Paper

To Clean Sponges

Statistics of Cincinnati

A Huge Propeller Screw

American Spiral Bullets in England

List of Patent Claims

Reform in the Patent Laws

Oil on the New York Central Railroad

Iron Steam Battery

When to Wear India Rubbers

How to Manufacture Saltpeter

Pennsylvania Coal

Flour Mills

The Condensing and Cornish Engine

Russian Sea Worms

Black Lead Pencils

The New Mechanics' Hall at Worcester

Hominy Machines

Ship Building in Maine

Rag Cutting Machines

Manufacture of Iron--Hot Blast; Saving of the Waste Gases

Horse Shoes by Machinery

How Machinery Increases Beneficial Labor

Cause of the Open Polar Sea

Opposition to Inventions and Discoveries

Franklin's Great Discovery

The Right Man for the Right Place

Medals to Scientific Men

Preparation of Gun Cotton for Collodion

Tunnels

Life at the Bottom of the Deep Sea

Expanding Flying Bridge

Who Was the Inventor of Steam Locomotives?

Recent Foreign Inventions

The Monster Mortar

Land Anchor for Carriages

Glue Impervious to Water

Improvement in Vises