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The Shapes of Leaves and Cotyledons

By John Lubbock

Bustards at the Zoological Gardens

Velocity of the Wind on the Eiffel Tower and at the Forth Bridge



Objects for the spectroscope.

Modern French Artillery

The Gun Factory of the Cail.

The Morgan Engineering Works

Great Tower for London

Sailing Ships

The Vyrnwy Aqueduct to Liverpool

The Asphalt Industry in France

The use of Gas for Cooking Purposes

Early Printing in America

By A. De F.

Automatic Gas Retorts

A Simple Barker's Mill

A Sewing Machine Motor for Amateurs

By C. D. Parkhurst

The Fixation of Nitrogen

By Charles A. Fawsitt

Useful Engineering Books

Building Plans and Specifications



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    July 19, 1890