The One-Man Torpedo Boat - A New Type, Small, Fast and Difficult to Detect, Am I my Brother's Keeper?, and more

The Silkworm's Formidable Competitor

How Artificial Silk is Being Extensively Made From Paper Pulp

The Microscopic Analysis of Iron and Steel

Some of the Methods and Results in This Interesting By-Path of Metallurgy

Wood Alcohol—A New Industrial Monarch

Its Production and Utilization in the United States During and Since the War