Simulated Atmospheres and Foreign Environments in Space Operations a Symposium Exotic Atmospheres on Earth

I F a man who had lived some hundred years ago were to return to life again today and glance at the title of this symposium, "Simulated Atmospheres and Foreign Environments in Space Operations.," he probably would think that he had reached the wrong planet and might immediately disappear again to his supernatural environment. In fact, our occupation with simulated atmospheres per se indicates the revolutionary newness in certain developmems we are now facing. The coming penetration of the extra-atmospheric regions ,of the vacuum of space makes the study of synthetic simulated atmospheres in a closed system urgent. Moreover, the