 How is Joe's asteroid fever cured?
Medical science is unanimous in proclaiming this magic medicine the sole panacea in the entire history of therapeutics." Our condenser broke down, and we've gone without water for five ghastly days." It's bitter as some kinds of sin before it's purified. "About seventy-five liters, if we go on half rations," he answered. The planetoid man worked the pump while the mayor intently watched the crude level-gauge, crying "Stop!" when it registered the proper amount. "Just the same," Joe griped, "paying for water isn't something you can get used to in ten minutes." It was on the sixth trip that Joe caught a glimpse of Jupiter-shine on a bright surface off to the left.
 Nothing does - his sickness was a ruse.
 The La-anago Yergis cures him.  Nothing does - his sickness was a ruse.  The bitter water that Harvey switched in cures him.  The fresh water from the planet cures him.