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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 Rope Machine

Improved Reducing Valve

Oil Mills

Steel—From the Ingot to the Finished Tool

By Arthur Y. Jacobs

Electric Bells

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

Arrow Release

Evergreen Shrubs

Departments

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January 29, 1887

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