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The Cork Oak

The Phylloxera

The Largest Flower in the World

Sponge-Borings in Marble

Fertilization of the Queen Bee

By T. B. Miner

The Apple Tree Borer Remedy

The Pith Plant

Cows and their Butter

Cure of Facial Neuralgia

Interesting Dental Operation—Philadelphia Dental College, Department of Oral Surgery

By J. E. Gahretson


The Electric Light

By J. T. Sprague

Salt Mine Illuminated by Electric Light

The Mirror of Japan, its Magic Quality

The Walled Lake in Iowa

Sun Engine

An Economical Arrangement of the Callaud Battery

By John Morgan

Krupp's Heavy Guns

Recipes for Dyeing

By N. Spencer Thomas

The ore Deposits of Leadville, Colo

By Carl Henrich

Cotton Yarn Dyeing

Wool Dyeing

The Silk Industry of Northern Italy

By E. T. Blakely

How to Make Photo Printing Plates

By T. Bolas


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