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Scientific American Magazine Vol 32 Issue 17

Scientific American Magazine

Volume 32, Issue 17

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Features

Improved Bridge Construction

Important Changes Proposed in the British Patent Laws

Progress of Rapid Transit in New York

A New Machine for Removing Snow from Streets

Scientific and Practical Information - April 24, 1875

Amalgams for Filling the Teeth

Kaolin in the United States

Test of American Iron and Steel

Another Earthquake Indicator

Beckwith's Improved Lumber Dog

A New Mercury Air Pump

Apparatus for Determining the Impermeability of Tissues

Dittman's Improved Locking Nut

A New Tack Hammer

The Anatifa

The Sun's Position at Different Seasons of the Year

A Chinese Patentee

Improved Shingle Machine

Improved Tanning Process

The Wardian System of Plant Cases

The Secretary Bird

The Modern Theory of Color

Decisions of the Courts - April 24, 1875

Recent American and Foreign Patents - April 24, 1875

Communications Received - April 24, 1875

Departments

Correspondence - April 24, 1875

Notes and Queries - April 24, 1875

Index of inventions - April 24, 1875

Business and Personal - April 24, 1875