The fact that from the most ancient times man has attributed to powerful mythical and actual characters the ability to fly seems to indicate that the desire to fly has ever been inherent in man from his earliest beginning.
There are many accounts in history of various attempts of man to learn the art of flying. Among the earlier accounts of what might be called man's modern conquest of the air should be mentioned the two historic balloon flights of Glaisher in 1862 and Tissandier in 1875. Glaisher's balloon ascended to an altitude of 30,000 feet (9,144 meters). Glaisher became unconscious from the effects of anoxemia, and was saved only because his companion barely managed to pull the valve cord allowing the balloon to descend.
Tissandier's balloon with three occupants ascended to 28,820 feet (8,534 meters); all three occupants became unconscious, and Tissandier's two companions died from anoxemia. Tissandier has
SMITH AC. MEDICAL ASPECTS OF AVIATION. Arch Otolaryngol. 1936;23(2):139–148. doi:10.1001/archotol.1936.00640040146001
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