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Features

The Orang-Mammas.—An Unknown Sumatran Tribe

By Gustav Schneider

Babylonian Seals

Animal Scavengers

The Giant Tortoise of the Berlin Zoo

Cyrtanthus Obliquus

Pollution of Streams, with Special Reference to the Chicago Drainage Channel

Fillets and Round Corners on Castings

By John M. Richardson

Stone Carving Machinery

The Bollée Voiturette

Trade Suggestions from United States Consuls

A Study of Anger

Selected Formulæ

Trade Notes and Receipts

New Boring Machine

A New Stopcock for Compressed Air Reservoirs

Fog Signal Detonator Economizer

The De Bange and Piffard Rapid-Fire Gun

The Labor of Discovering a New Element

The use and Abuse of Food Preservatives

By Samuel Rideal

Government Telegraphy

Patents!

Why is Water Blue?

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