Scientific American Magazine Vol 13 Issue 24

Scientific American Magazine

Volume 13, Issue 24

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Features

Improved Air Purifier, Steel Pens, and more

Latest Foreign Intelligence

Water-Proof Goods

The Progress Machine Works

Recent American Patents

Market for the Month

Reynolds's Bag Holder

Emerson's Saw Tooth

Raising of a Wreck

Improved Current Water Wheel

Acquiring Information

An Excursion to the Coal Fields

Inventor's Associations and the Patent Laws

The Difference Between New and Old Ale

Patent Claims

Issued from the United States Patent-Office

Departments

Correspondence

Notes and Queries