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The First Crossing of the Alps in an Aeroplane

New Linear Expansion Apparatus

An Instrument for Making Numerous Determinations in a Single Student's Laboratory Period

By George A. Cowen

African Wild Silks

The Practice and Theory of Aviation.—I

The Leading Aeroplanes

By Grover Cleveland Loening

The Water Service of a Plant

The Accumulation of Water by Desert Plants

By D.T. MacDougal

A New Record in Telephotography

By Arthur E. Joerin

Eiffel's Experiments

The Eiffel Aerodynamometric Installation

Hollow Posts of Reinforced Concrete

A 1,000-Mile Wireless Station.—IV

How to Construct the Receiving Station

By Edward H. Guilford

The Isolation of an Ion.—III

A Precision Measurement of Its Charge and the Correction of Stokes's Law

By R. A. Millikan

A Method of Finding the Meridian by Shadows and Mechanically Graduating a Sun-Dial

By Edison Pettit

The Japanese Camphor Industry

Sorcerers Past and Present

By G. Le Notre

The Electricity of Rain and Snow


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