If city streets were filled with an invisible, slow-working poison, touched and breathed by every passerby, so that vast portions of the population lost the use of some of their muscles, became impotent and sterile, sickened, sagged and died, that would be a very sorry pass indeed.

Whether or not tetraethyl lead, as prepared for dilution in gasoline to quiet "knocking" motors, would constitute such a poison, scientists disagree.

Last week, U. S. Surgeon General Hugh S. Cumming gave notice that the case would be tried by...

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