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Effects of Heat on Iron

Paper Calendering and Cutting

Studies in Pyrotechny

The Pneumatic Hydrometer

Modern War Ships

The Spanish Cruiser Destructor

The Hudson River Bridge at Poughkeepsie

The Diamond Mine of Wisconsin

Magnetic Carriages in China and Japan

Some Curious Flames

By Thomas Fletcher

Purification of the Water Supplies of Cities

By Albert R. Leeds

The Sympathetic Nervous System

By Walter H. Gaskell

Astronomical Telescopes: Their Object Glasses and Reflectors

By G. D. Hiscox

On the Cutting of Polarizing Prisms

The Manufacture of Lenses

Cameo Cutting as an Occupation

By John B. Marsh

On Kites

Is Botany a Suitable Study for Young Men?

By J. F. A. Adams

Medicated Gas

Driving a Needle through a Coin


  • Departments

    Patents - March 5, 1887

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Dwindling Supply. Increasing Demand.

Dwindling Supply. Increasing Demand.

Solving the Water Crisis