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Features

Platinizing or Platinum Plating

The Various Methods Pursued

By Friedrich Hartmann

Resinit

The Analytic Eye and the Synthetic Ear

The Contrast between the Senses of Sight and Hearing

By R. Defregger

Theory and Practice of Illumination

Some Practical Considerations

By Thomas W. Rolph

Processes for the Fixation of Atmospheric Nitrogen

The Perception of Light in Plants

By Harold Wager

Lightning and the Airship

The Dangers of Atmospheric Electricity in Aeronautics

By L. Zehnder

The Tunnel under the Detroit River

A Wonderful Engineering Achievement

By Norman B. Beasley

The Eighth Satellite of Jupiter

Telephones for Peking

An Electrical Innovation in an Ancient City

Sterilization of Water and Milk with Ultraviolet Rays

By P. Santolyne

The Role of Visual Function in Animal and Human Evolution

By George M. Gould

The Structures of the Stone Age

How the Great Megalithic Monuments were Probably Erected

The Effect of Carbon Dioxide on Fishes

The Age and Growth of Fishes

The Results of Recent Marine Investigations

Electrical Notes

Trade Notes and Formulæ

Engineering Notes

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