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The Phosphates of Picardy

Heliography, or the Actinic Copying of Engineering Drawings

By B. H. Thwaite

Deterioration of Bleaching Powder

The Welsbach Incandescent Gas Burner

The Explosive “Kinetite”

Fast Black for Yarn Dyeing

Zinc Rollers for Calico Printing

Pyrometers for Porcelain Kilns

North American Carriage Woods

Butter Colors

By H. B. Cornwall

Plush with a Waved Surface

Filter Presses for Sewage Sludge

Machine for Elbowing Sheet Iron Pipes

The Steamer Great Eastern

Single Rail Railways

Improved Electro-Metallurgical Process

Working Old Steel

The Wimshurst Electrical Machine

The Inventor

A Toy Electric Railway


Ferric Chloride as an Exciting Agent

By H. N. Warren

Gases from New Woolen Goods

The Velocity of Light in Air and Refracting Media

Solidified Oils

By C. R. Alder Wright

Gastric Digestion in the Horse

By H. Goldschmidt

Health and Longevity

By J. R. Buchanan

Dangers of Water Gas

Volcanic Eruption of Silver

On The Occurrence of Silver in Volcanic Ash from the Eruption of Cotopaxi of July 22 and 23, 1885 *ast;

By J. W. Mallet

The Eskimo

Vegetable Products of East Africa

The Sun's Heat

Browning of Steel and Iron

Globe Flowers

What Sorts of Wheat shall we Cultivate?

By F. Schindler


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March 12, 1887