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Features

An English Electric System of Railway Signaling

By F. C. Perkins

Theory of Coherer Action

How to Build a Small Alternating-Current Dynamo without Castings

By Nevil Monroe Hopkins

Chemical Solubility

By O. N. Witt

Contemporary Electrical Science

Iron and Steel Hull Steam Vessels of the United States

Northwestern Lakes

By J. H. Morrison

Measurement of the Specific Magnetization of Diamagnetic or Slightly Magnetic Bodies

By Emile Guarini

Old Age

By Elie Metchnikoff

Mink Furs

By Chaeles H. Stevenson

The Milky Way and the Clouds of Magellan

The Curious Fructification of the Fig

On the Perception of the Force of Gravity by Plants

By Francis Darwin

Plant Nutrition

Engineering Notes

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    November 11, 1905

    Think Outside the Gift Box