SA Supplements Vol 61 Issue 1569supp

SA Supplements

Volume 61, Issue 1569supp

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Features

Novelties at the Paris Automobile Show

By the Paris Correspondent of Scientific American

The Winter Sleep of Animals

Armored Concrete.—Part III

Henry J. Jones

The Gas Turbine

Concrete Building Blocks

Water-Proof Qualities

S. B. Newberry

Polishing Wheels

The “Motogodille,” a Motor Device for Propelling small Boats

Enameling on Iron

To keep Pipes from Freezing

Treatment for Electric Shock

The Production of Natural Gastric Juice

Artificial versus Natural Dyes

O. N. Witt

Lunar Photography

By the Paris Correspondent of Scientific American

The Pressure of Light

Canals on Mars

The Electric Spark

G. A. Hemsalech

Electrical Notes

Science Notes

Contemporary Electrical Science

Trade Notes and Formulæ