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The English Sparrow

The Gorgon Gnu

The Sea Serpent

Summer Walks After Unseen Things

(Proceedings of the Academy of Natural Sciences, Philadelphia.—Biological and Microscopical Sections, October 20th, 1879)

By R. S. Kenderdine

A Tortoise 150 Years Old

The Tiger at Bay

The Progress of Iron and Steel as Constructive Materials

By J. A. Picton

Zinc Veins and Works of Lehigh Valley

Mould as an Insect Destroyer

By C. G. Siewers

American Engineering—VI

A Pneumatic Elevator

Hog Cars

Railway Car Construction, Past and Present

The Dynamical Power of Steam

The Z System of Block Building

The Casting of the 100-Ton Gun in the Turin Gun Foundry

Compressibility of Gases at High Pressures

By E. H. Amagat

Digestive Ferment of Carica Papaya

By A. Wurtz and E. Bouchut

Properties and Functions of Chlorophyl

The Chloride of Methyl Ice Machine

A New Method of Preparing Sulphureted Hydrogen

By J. Fletcher

Improved Packing Paper

Alkaline Amalgams

By M. Berthelot

Virginia

Hydrocarbon from Rosin Oil

By W. Kelbe

A New and Very Powerful Electrical Ozonizer

Aspido Spermin

By G. Fraude

Kreatinin and Kreatin

By Th. Weyl

Consumption

By Charles G. Polk

Action of Drugs on the Secretion of Bile

The Role of Pathological Anatomy

By J. Cohnheim

The Beginnings and the Development of Life

By Edmond Perrier

The End of the Great Captive Balloon

Ways of Remembering

By J. Mortimer Granville

The Solar Temperatures

By J. Jansen

A New Form of Leclanche Battery

Sound Vibrations and the Telephone

By A. E. Dolbear

The French Association

The Temperature of Carbons Giving the Electric Light

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    November 22, 1879