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Features

Iron Ore Reserves

When Will the World's Iron Supply Give Out?

By Charles Kenneth Leith

Mercury and Intramercurial Planets

A Review of Three Centuries of Study

By Abbe Th. Moreux

Our Legion Newspapers

Ancient Babylon

The Progress and Results of the German Explorations

By Friedrich Delitsch

Ultra Filtration

A Proof of the Existence of Molecules

By Bechhold

Behavior of, Plants' Toward Aluminium

An Investigation of a Novel Problem

By Wolf-La Baume

The Fight against Extermination

What Has Become of Some Well-Known Birds

Ancient Association of the Rat with Plague Epidemics

War Balloons

The Military Use of Captive Free and Dirigible Balloons

By Auguste E. Gaudron

The Oxy -Acetylene Blowpipe

A New Metallurgical Instrument

By Cecil Lightfoot

Types of Recent Foreign Flying Machines

Some French and Danish Aviation Apparatus Already Built or Building

The Arc and the Spark

Their Use in Wireless Telegraphy

Platinum Residues

The Technology of Molasses

Its Utilization in the Arts

By Theodor Koller

Electrical Notes

Trade Notes and Formulae

Science Notes

Departments

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March 14, 1908

Think Outside the Gift Box