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Front Matter

Back Matter

First Glances at New Books

Breathing Exercises Help Sufferers from Asthma

One of Birth’s Mysteries Solved by Hormone Study

Rare Meteor Spectrum Obtained by Astronomer

How Do We Hear?

Great Hydrogen Outburst on Sun Preceded Radio Fading

Cosmic Rays Promise to Test Needed Super-Einstein Theory

Nature Ramblings: Batty Notions

[Photograph]: Giant 9-Lens Camera

Transplanted Animal Hearts Keep Beating for Months