Scientific American Magazine
Volume 178, Issue 4You are currently logged out. Please sign in to download the issue PDF.
Features
Departments
50 and 100 Years Ago: April 1948
An Announcement to our Readers
Progress in the Heat Treatment of Steel
The Worst Weather in the World
Phosphorus: Bearer of Light and Life
Manufacturing Advances in Wartime Germany
What to Look for in FM
The Settlement of Canada's Northland
Vacuum Metallurgy
X-Ray Thickness Gage, Diamond Chip Amplifier, and more
Moisture Detector, Finger-Tip Aircraft Control, and more
Expansion Fitting, Chilled Bismuth Dies, and more
Silent Mercury Switch, Cotton Fiber Analyzer, and more
Current Bulletin Briefs
Books
Telescoptics
