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Smoke Prevention

The Relation of the Character of Coals to the Prevention of Smoke

By D. T. Randall

Parchment Paper and Vegetable Parchment

The Tyranny of Scientific Dogma

The Ant and her Ways

A Biological Study

By K. Escherich

Nitrate of Soda

Its Consumption in the United States

By Charles E. Monroe

A New Method in Criminology

The “George Washington.”

The New North German Lloyd Steamer

Photographs in Natural Colors on Paper

By A. Berthier

The New Automobile Steels

Their Use in Motor-Car Construction

By John A. Mathews

The Auer Gas Radiator

Automatic Feeders

Devices for Handling Material in Bulk

By C. Kemble Baldwin

Electricity as a Fuel

Engineering Notes

Electrical Notes

Trade Notes and Formulæ

The Scientific American Supplement. Index for Vol.67


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