Science: Deep Blue Water

What makes blue water blue? Every schoolboy knows that, on a clear day, the sea looks blue when looked at from a low angle: it is merely the blue sky reflected in the water's surface. But Dr. Francis A. Jenkins of the University of California and Dr. Ira S. Bowen, now director of Mt. Wilson Observatory, announced this week that they knew why deep water is also blue when looked at from above at close range.

While doing antisubmarine research for the Navy, Jenkins and Bowen examined seawater under an ultraviolet microscope. Every cubic inch, they discovered, contained about 1,500,000 submicroscopic...

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