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Dr. Koch's Discoveries

The Protection from Diphtheria and Tetanus by Inoculation

The Mojave Indian Litter

By Charles Albert Sewall

The Ballistic Pendulum

Improved Drain Pipe

By E. Waring

Cotton Flannels

Steamships of the Canadian Pacific Railway Company

New Process of obtaining Oxygen

By Fritz Salomon

The Oxidation of Sulphides by means of the Electric Current

By Edgar F. Smith

King's College, London

A Simple Watch Demagnetizer

The Hazeltine Arc Lamp Carbon Shield

Military Signaling

Building Plans and Specifications

Electric Transmission of Power at Calais

The Common Walnut

Useful Engineering Books

The Scientific American Supplement. Index for Vol.30


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December 27, 1890

Of Shamrocks and Science

Happy St. Patrick’s Day