Show LIFE IN RAREFIED atmosphere scientists have proved limit to which human beings may ascend how high in the air can a man rise without twenty years ago it was thought that it would be imps elble to breathe at an atmospheric albl tude exceeding meters foet it was supposed that a man would lose consciousness at 6 meters but dehring and at strasbourg went up in a balloon to a height of 10 meters 32 feet the greatest height ever attained but they were forced to inhale oxygen strange to say prof mosso ot baly experimented on a theory that a man must respire oxygen with a strong proportion of carbonic acid if he would successfully fight the dangers of the rarefaction of air it Is scald that the theory Is correct A pupil of his repeated the expert ment not by going up in a balloon but by shutting himself up in a bell where by means of a pump a bradu al increase of rarefaction was obtained when the exhaustion of air reached a point at which the experimenter began to collapse a specially devised arrangement sent into the bell a mixture of carbonic add and oxygen and he was immediately relieved in the experiment the exhaustion finally attained equaled a height of 50 feet 14 12 kilometers the ex peri menter said I 1 could have re alsted an even greater rarefaction for my memory was clear and my movements were normal |