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Features

Peary and the North Pole

Twenty Miles under the Sea

Racing Yachts in a Gale

Electricity

Science

Engineering

Testing a Torpedo-Boat Defense

By An Eyewitness

The First Cross-Country Flight of the Aeronautic Society's Biplane

A Record Cross-Country Motor-Boat Trip

Thunderstorms

The Effect of Polar Currents on Gulf Stream Plankton

A New Application of the Diving Bell

The Excavations at Delos

Conjunctions of the Planets

By Frederic R. Honey

A Novel Solution of the Problem of Telephotography

By Alfred Gradenwitz

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  • Index of Inventions

  • Recently Patented Inventions

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August 21, 1909

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