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Features

Street Pavements

The French Gunboat Gabriel Charmes

Two Modern Chimneys—A Study of their Design and Construction

By C. Powell Karr

The Raffard System of Band Wheels

A New Ice Machine

Improved Reducing Valve

Improved Rope Machine

Oil Mills

Electric Bells

Steel—From the Ingot to the Finished Tool

By Arthur Y. Jacobs

The Application of Cellulose to Electric Batteries

Apparatus for Measuring the Intensity of Light in Apartments

Our Building Stone Supply

By George P. Merrill

History of the Velocipede

Note on the Origin of Comets

By Daniel Kirkwood

Evergreen Shrubs

Arrow Release

Departments

  • Departments

    Patents - January 29, 1887

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Why Do Facts Fail?

Why Do Facts Fail?

Deconstructing Denial