Volume 101, Issue 18
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Features
Our Vanishing Timber Supply
Death of Prof. Lombroso
Slag a Cause of Broken Rails
Electricity
Science
Engineering
The Brussels Popular Electrical Laboratory
Playing with Fire
A Surveyor's Telephoto
Accident Preventer
Differential Speed Indicator
A Curious Chemical Growth
Measuring Holes by Electricity
High-Speed Destroyers for the United States Navy
Why Do Watch Springs Break?
An Optical Phenomenon
The Breaking of Main Springs in Storms
Leduc's Figures
A Magic Square
How Germany Makes Forestry Pay
Combined Friction and Jaw Clutch
Oddities in Invention
A Perfected Form of Lock Nut
Sleigh-Runner Attachment for Baby Carriages
Patent Department
An Improved Planter