Scientific American Magazine

Improved Diamond Stone Saw

Electric Earth Batteries

Something about Balloons

Torpedoes for Harbor Defense

Scientific and Practical Information

Senate Confirmations

Improved Die Tap

Filtration under Pressure

The Underground Railway, New York City

The Crescent Steel Works at Pittsburgh, PA

Practical Mechanism

The Bessemer Saloon Steamship

Cutting Gear Wheels

Highland and Lowland Cattle

The Vegetable Fibers at the Universal Exposition, Vienna

Decisions of the Courts

Recent American and Foreign Patents - January 30, 1875

Canadian Patents - January 30, 1875

Communications Received - January 30, 1875

Correspondence - January 30, 1875

New Books and Publications - January 30, 1875

Notes and Queries - January 30, 1875

Business and Personal - January 30, 1875

Index of Inventions - January 30, 1875