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Platinizing or Platinum Plating

The Various Methods Pursued

By Friedrich Hartmann


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

Lightning and the Airship

The Dangers of Atmospheric Electricity in Aeronautics

By L. Zehnder

The Perception of Light in Plants

By Harold Wager

The Eighth Satellite of Jupiter

The Tunnel under the Detroit River

A Wonderful Engineering Achievement

By Norman B. Beasley

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 Age and Growth of Fishes

The Results of Recent Marine Investigations

The Effect of Carbon Dioxide on Fishes

Electrical Notes

Engineering Notes

Trade Notes and Formulæ


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    October 09, 1909

    20% Sitewide for President's Day