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Features

The Resources of the Russian Empire

A Country of Great Economic Importance to America

By E. K. Reynolds

A Cheap Disinfectant

The Military Rifle

Many Delicate Operations Required to Produce a Perfect Weapon

Formation of Albumin by Yeast from Different Sources

The History of Individual Armor

Their Evolution Since Antiquity—Their Future

The Markings of Mars

By Alfred Rordame

Fastening Metals to Marble

Galvanizing and Tinning Iron Wire

On the Greater use of Indian Foods

An Era of New Food Resources

Human Psychology and Animal Psychology

By C. Saint Sa*amp*euml;ns

Buttons as By-Product of Beer

Long Reinforced Concrete Bridges

Military Motor Truck Design

Interesting Facts Developed on the Mexican Border

By H. D. Church

An Ionization Manometer

By O. E. Buckley

Corrosion of Tinned Sheet Copper

Trench Building Animals

And Their Expert Engineering Work

By Henri Coupin

Oil Tanks for the British Navy

Old Tactics and Discarded Armaments Brought Back to Life by the Present War

By George Nestler Trioche

The Propagation of Electric Waves

At the Surface of the Earth and the Ionized Stratum of the Atmosphere

By H. Nagaoka

A Canvas-attacking Fungus

An Enlarged Electron of Practical Size: The Faraday

The Faraday

By Carl Hering

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