Another Warning

SMOKING

In the latest of a long series of warnings, the U.S. Public Health Service reported to Congress last week that a man between 25 and 35 who smokes two packs a day shortens his life by an average of eight years. It added that even a light smoker, on less than half a pack a day, may cut off four years.

The P.H.S. did not limit its concern to lung cancer, but pointed to an "increasing convergence" of new evidence that smoking can contribute to the development of heart disease. It does this, according to latest research, by producing a gap between the heart's demand for oxygen and the blood's ability to supply it.

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