14/22 "That is, until the poor begin to gasp for breath. But what then ?" "By the time the outer atmosphere really begins to show the effect of withdrawing a considerable percentage of the oxygen," Flint answered, "we will have our pocket respirators on the market. Well-to-do people will as soon think of going out without their shoes, as they will with their respirators. No, there won't be any visible tubes or attachments, Wally. |