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Scientific American Magazine Vol 80 Issue 22

Scientific American Magazine

Volume 80, Issue 22

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Features

Gruson Armor in the United States

Liquid Air in High Explosives

The Pan-American Exposition

Gold in the Philippines

The East River Tunnel

Commercial Production of Liquid Air

Some Smokeless Powder Considerations

Frederick H. M'gahie

The Plant Products of the Philippine Islands

Photography of Paintings and Drawings

The "Reina Mercedes"

An Iceberg at St. John's, Newfoundland

Pocket Voltmeter and an Electric Soldering Iron

A Feed-Water Purifier and Skimmer for Boilers

A Chinese Typewriter

A Powerful Open Circuit Battery Cell

Photography in the Colors of Nature

The Measurement of Shutter Speed

Navies of the World

The Bird Giants

Charles Frederick Holder

To Inventors - June 3, 1899

Departments

Correspondence - June 3, 1899

Notes and Queries - June 3, 1899

Recently Patented Inventions - June 3, 1899

Business and Personal - June 3, 1899

Index of Inventions - June 3, 1899

Patents - June 3, 1899