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Features

The Orang-Mammas.—An Unknown Sumatran Tribe

By Gustav Schneider

Babylonian Seals

Animal Scavengers

Cyrtanthus Obliquus

The Giant Tortoise of the Berlin Zoo

Fillets and Round Corners on Castings

By John M. Richardson

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

Stone Carving Machinery

The Bollée Voiturette

A Study of Anger

Trade Suggestions from United States Consuls

Selected Formulæ

Trade Notes and Receipts

A New Stopcock for Compressed Air Reservoirs

New Boring Machine

Fog Signal Detonator Economizer

Government Telegraphy

The use and Abuse of Food Preservatives

By Samuel Rideal

The Labor of Discovering a New Element

The De Bange and Piffard Rapid-Fire Gun

Patents!

Why is Water Blue?

Departments

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May 05, 1900

Think Outside the Gift Box