 What is the purpose of paraoxynebutal?
[Transcriber's Note: This etext was produced from Galaxy Science Fiction November 1951. Rootless and footloose, a man in space can't help but dream of coming home. Flight Officer Robert Craig surrendered the tube containing his service record tapes and stood waiting while the bored process clerk examined the seal. "Los Angeles, eh? "Insert your right arm into the instrument on the central table," commanded the same voice he had heard before. "With the help of paraoxylnebutal," supplied the captain. Your body is conditioned to a normal state of free fall, or at best to a state of acceleration." That is why all spacemen carry PON, paraoxylnebutal, with them. It helps suppress certain physiological reactions to an entirely new set of conditions. Channels of the ear, for example. They play an important part in our awareness of balance. Returning to gravity is rather frightening at first." "Do you know what sailors of ancient times meant by 'sea legs?'" asked Wyandotte. If the service needs men so badly, let them get somebody else. You will be given a very liberal supply of PON—which you will definitely need. On the eighth day, two attendants, who showed the effects of massive doses of PON to protect themselves from the centrifugal force, had to carry a man out of the tank. "How ... how do they know when you ought ... to come out?" "Blood pressure.
 It helps people adjust to changes in gravity
 It relaxes the sympathetic nervous system  It puts a human to sleep for up to 12 days  It helps people adjust to changes in gravity  It opens the airways to allow for easier breathing