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Improvements in New york's High-Pressure Fire Service

Dover's Great Artificial Harbor

The America's Cup




A Remarkable Mexican Concrete Conduit at Guadalajara

By Frank C. Perkins

Some Principles of Ball-Bearing Design

By J. F. Springer

Terrific Boiler Explosion in Milwaukee

A Curious Star Map

The Number of Our Ancestors

Some Curiosities of Invention

The 10,000-Ton Suction Dredger “Leviathan” for Use on the Mersey

The Attitude of Diplodocus

Birds of Passage

By B. S. Bowdish

The Ophthalmo-Diaphanoscope

Testing Bitumens for Pavements


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  • New Books, Etc.

  • Recently Patented Inventions

  • Index of Inventions

  • Patents

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