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Scientific American Magazine Vol 80 Issue 17

Scientific American Magazine

Volume 80, Issue 17

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Features

Official Test of the New Army Wire Gun

Sine-Wave Telegraphy

What Our Consuls are doing for American Trade

That Athbara Bridge Contract

A Parisian Egg Forger

American Machine Tools in England

The Heavens in May– April 29, 1899

Garrett P. Serviss

National Academy of Sciences

Marcus Benjamin

The Marvin Electric Rock Drill

A Convertible Plow

A Cheap Method of Making a Calorimeter

An Improved Band-Saw-Setting Machine

An Automatic Spring Fish-Hook

An Improved Lemon-Squeezer

Sutro Baths of San Francisco

F. W. Parsons

Manufacture of Krag-Jorgensen Rifles at the Springfield Armory.--I

The Californian Sea Lion

To Inventors - April 29, 1899

Departments

Correspondence - April 29, 1899

Recently Patented Inventions - April 29, 1899

Index of Inventions - April 29, 1899

New Books Etc - April 29, 1899

Business and Personal - April 29, 1899

Notes and Queries - April 29, 1899

Patents - April 29, 1899