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The New York Trade Schools

The Retsof Salt Mines at Greigsville, N. Y.

By S.L. Sheldon

Science in the Theater

Flats for Professional Men

The Foot Bellows as a Musical Instrument

A New Torpedo Boat

A Temporary Rudder

The Electromagnet

By Silvanus P. Thompson

The Primuline Process

A New Photographic Printing Process-Directions for Working

Military Signaling

Floods in Australia

Is there Life among the Stars?

The most Volatile Constituents of Coal Tar

Buff Cochins

Correcting Irregularities of the Teeth

By V. H. Jackson

The Unburned Gases of Gas Stoves and Burners

Building Plans and Specifications

New Velvet Pile Crysanthemum

Tricycle Coaches

Useful Engineering Books


  • Departments

    Patents- December 20, 1890

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