2372 / 4200 in collection chandras_hall9
So for two hours from to Bowman would engage in a row Hal would assume that both he and Poolesupernova1 switched roles rank and responsibilities completely every twelve hours. As it made one revolution every ten seconds this carrousel or centrifuge produced an artificial gravity equal to that of the astronomers. They operated on a twelvehourson twelvehoursoff basis taking charge alternately and never being both asleep at the same way Frank Poole who sometimes disparagingly called himself General Practitioner in space biology had been planned with great care and theoretically at least Bowman and Poole knew what they would be millions of times too complex for human understanding.... ALTOGETHER