The Giant Tortoise of the Berlin Zoo
Pollution of Streams, with Special Reference to the Chicago Drainage Channel
Fillets and Round Corners on Castings
Stone Carving Machinery
The Bollée Voiturette
Trade Suggestions from United States Consuls
A Study of Anger
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
Why is Water Blue?
New Books, Etc.