The heavy brass cylinder lay motionless on the green felt blotter.
It was ten inches long, machined from solid brass, and slightly flattened at the seams from decades of pneumatic transit. The metal radiated a steady, unnatural warmth.
“Don’t pry it with steel,” Lin Mei cautioned from the edge of the counter.
She set her Pickett slide rule beside the desk lamp and adjusted the focus of her jeweler’s loupe.
“Pneumatic canisters under sub-basement pressure can hold thirty pounds per square inch of residual vacuum,” Lin Mei said. “If the thread binds, the seal can rupture.”
“It isn’t vacuum-sealed,” Julian said.
He leaned over the blotter, his fingers resting lightly against the knurled rim of the cap.
“Feel the air around the threading,” Julian said. “The pressure is equalized. It was vented through the terminal valve before the hopper dropped it.”
