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SA Supplements Vol 54 Issue 1393supp

SA Supplements

Volume 54, Issue 1393supp

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Features

The Krupp Exhibit at the Duessel- Dorf Exposition

Concrete Slab Tests

Thermo-Electric Measurement of Stress

The Perseid Meteoric Shower of 1902

Pine-Needle Oil in Germany

Gas Engine Ignition by Contact or Catalytic Action

A New Arc Lamp

The Manufacture of Bisulphide of Carbon in the Electric Furnace

Edward R. Taylor

Long Distance Power Transmission

F. A. C. Perrine

Contemporary Electrical Science

The Northrop Loom

Irving U. Townsend

A Substitute for Sheep's Wool

Royal Society Report on the West Indian Eruptions

Automatic Carving Machines

A Chart of the Human Hair Streams, Showing their Lineage and History

Walter Kidd

Death of Prof. Virchow†

The Relation of the Psychic Life to the Nervous System

Trade Suggestions from United States Consuls

Trade Notes and Recipes

Selected Formulæ

Patents!