PREVIEW
... ssure gauge. The dial was marked with three warning zones: green, yellow, and red.
Following the pipeline upward from the pressure relief valve, Hughes discovered that the other end was connected to a metal cylinder. After estimating its weight, he gasped.
"This must be dozens of pounds, right?"
"More than that. The steam chamber hasn’t even been filled with mercury yet. Once full, it’s close to three hundred pounds."
"Huh?" Hughes was dumbfounded. This thing was ...
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