Features
Silent Enemies
Until Sanitation Becomes Universal, Man Will Harbor Internal Parasites and Suffer From Them
Open House
New Engineering in the Navy
High-Pressure, High-Temperature Steam for Warships, More Reliable Machinery, Greater Speed, Economical, Equipment for Our New Warships
A Famous Theory Weakens
The Encounter Theory of the Origin of Planets Has Now Become Shaky and May Pass into the Limbo Where the Old Nebular Hypothesis Went
Debutante Metal--Beryllium
Large Supplies, Makes Extremely Hard Alloys of Copper, Other Metals, Low Percentage is Needed Research Finding New Alloys, New Uses
Why Pure Science Pays
Time After Time Scientists Interested in Finding New Facts Purely for Their Own Sake - Intellectual Curiosity--Have Handed Fortunes to Industry
Soundless Sound Waves
The Odd Realm of Supersonics-Inaudible, Versatile Vibrations-is Receiving Increasing Attention From Scientists
Restoring Rome's Colosseum
Recent Excavations Beneath the Ancient Arena Reveal Elevator Shafts for Raising Wild Beasts to the Combat Level by Means of Counterweights
Glass Takes On Color
New Fields Opened for Plate Glass, Decorative Mirrors, Sand-Blasted Designs, Panels Lighted at Edges, Careful Experimentation
An Engineered Lily Pad
Mystery of the Magnetic Mine
Departments
50 Years Ago, March 1940
- From the Editor
Our Point of View, March 1940
- Recommended
Our Book Corner, March 1940
- Departments
Personalities in Science, March 1940
Screen Made by Electroplating, The Eskimo Goes Modern, and more
Camera Angles, March 1940
Telescoptics, March 1940
Current Bulletin Briefs, March 1940
Legal High-Lights, March 1940