Volume 162, Issue 2
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Features
Photography In Crime Detection
Valuable Contributions, Need Seen for Uniformity of Photographic Records, Automatic Cameras for Picturing Criminals in the Act
A Bridge That Floats
Four-Lane Highway on Monster Pontoons, Over a Mile Long, Tied By Cables to Great Anchors in Bottom Mud, Safe, Vibrationless, Permanent
Air, Water, Coal = Hosiery
Fiber From Abundant Raw Materials, Fiber is Only One of a Large Family of Chemical Products Known as Nylon, Research That Led to Them
Stopping Time
That is What "Whirling Watcher" Does, Newest Stroboscope is Light Weight, Portable, Allows "Stills" and Movies of Extremely Fast Movement
Winners in the Fourth Annual Scientific American Photography Contest
Algol's Eclipses
Seven Million Maps
Molds By Electro-Forming
Engineering In Dentistry
Dentists' Main Problems are to Get Strength Plus Resiliency, Add to This: Art, Precious Metal Alloys and New Porcelains Meet Needs of Dentists