Abstract
The author discusses in a broad way recent mortality variations in the U. S. with special reference to geographic variations, sex, age and racial groups. Reduction in mortality has been greatest for children and young adults in large urban centers, where medical and public services are the most completely developed. Preventable mortality in children is relatively high in rural communities of the U. S. and high in the smaller cities of the south. In middle life, urban males have a markedly excess mortality as compared with females and the difference is increasing. This is true also for rural males but to a lesser extent.

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