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Improved Spinning Mule

Lubricating Oils

Measurements of Friction of Lubricating Oils *

By C. J. H. Woodbury

Copying Maps and Plans

Photographic Surfaces More Sensitive for the Green, Yellow, and Red Rays

By H. W. Vogel

Improved Tandem Engines

The Saint Etienne Tramways

Spring Motors for Vehicles

The Dutton Sluices

Improved Spring Wheels

Combined Wood and Iron Wheels for Portable Engines

On the Influence of Punching Holes in Soft Steel

By V. N. Beck Guerhard

On Japanese Camphor Oil

By H. Oishi

A Veranda

The World's First Meridian

By Richard A. Proctor

Transmission of Electric Power at Bienne, Switzerland

Photographing the Larynx

By Thomas R. French

Obstruction of Drain Pipes by Roots

By F. A. Calkins

The Hypnoscope


By J. Starkie Gardner

A Group of Cactus in Jamaica

Underground Water ad the Moisture of the Soil

By FR. Hofmann

Water Meters

The Liquefaction of Gases

An Absolute Standard of Light

Reduction by Electrolysis


  • Departments

    Patents - January 24, 1885

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