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Features

Domestic Art Pottery and its Manufacture

By Jane Stannard Johnson

Sand-Lime Brick

By E. W. Smythe

The Silicon Detector, and Measurement of Electric Wave Energy

By William Maver

The Boyd Automatic Tide Signaling Apparatus

What are Earthquakes?

By Hudson Maxim

Cement Piers

Some Properties of Vanadium Steel

How small Quantities of Vanadium Affect Different Mixtures of Iron and Steel and where it is Just Useful

By E. F. Lake

Aerial Locomotion

With a Few Notes of Progress in the Construction of an Aerodrome*

By Alexander Graham Bell

Schools of Airship Instruction in Germany and France

The Influence of Physical Conditions in the Genesis of Species

By Joel A. Allen

Parasitism and Mutualism

A Vast Neglected Field for Archæological Research

By Harlan I. Smith

Electrical Notes

Engineering Notes

Science Notes

Trade Notes and Formulæ

Departments

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    May 25, 1907

    Think Outside the Gift Box