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The Sneeze and its Diagnostic Value

Deep Sea Hospital Ships

Changing a Four-Crown to a Single-Crown Pulley

How a Storage Battery Works

The Apothecary

By J. W. Wainwright

Utilization of Energy in Wireless Telegraphy

An Ingenious Portable Electric Drill

The Labyrinth of Crete

American Ethnology

The making of the Clay Pipe

A New System of Seasoning Wood with Saccharine or Sugar

Artificial Marble

Methods of Measuring Velocity in River Channels

By H. A. Pressey

Causes of Explosion of Acetylene and means of Preventing Them

Experiments in Radio-Activity, and the Production of Helium from Radium

The Future of Coal Gas

An Automobile Supported by a Man

Fuels other than Coal and Wood

The Botanical Laboratory of the Carnegie Institution

Contemporary Electrical Science

Walking on the Head

Trade Notes and Recipes

Engineering Notes

Electrical Notes

Trade Suggestions from United States Consuls

Selected Formulæ


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September 05, 1903

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