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An Improved Electric Steel Furnace

By Alfred Gradenwitz

The Wastes of a Blast Furnace

How They are Utilized

By Edward M. Ha*amp*gacute;ar

Determininǵ Aeroplane Altitudes

How a Machine's Height is Measured

By Henry Harrison Suplee

Suǵar Refininǵ

The Processes of Manufacture

By W. D. Horne

A Graphical Solution of the Quadratic Equation

By Albertus Darnell

How Exporters Should PacK

Suggestions from United States Consuls and Foreign Business Men

Radiant Enerǵy and Matter—I

By J. J. Thomson*amp*apos;s

Carbureters and Vaporizers

How They Should be Designed

By T. A. Borthwick

The Lost Arts of Chemistry

The Origin and Reason for Some Widespread Beliefs

By W. D. Richardson

Automatically Drawn Curves

Instruments that Represent Varying Conditions

By Albert A. Somerville


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