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"in 1974 I experienced an invasion of my mind by a transcendentally rational mind, as if I had been insane all my life and suddenly I had become sane."
- Philip K. Dick

Smoke Jets (Air Leak Detection)  
  A means of determining the location of air leaks in a building built on an airless moon.  

"Look!" he grunted, and jerked a grim jaw at one of the dials. The long needle was moving rapidly to the right. "I can't hold the air pressure!"

"Wow, what a leak!" Darl started forward. "How's it below, in the mine?"

"Normal. It's the Dome air that's going!"

"Shoot on the smoke and I'll spot the hole. Quick, man!"

"Okay!"

Thomas' long legs shot him out of the headquarters tent. Just beyond the entrance flap was one of the two gyrocopters used for flying within the Dome. He leaped into the cockpit and drove home the starter-piston. The flier buzzed straight up, shooting for the misted roof.

The Earthman fought to steady his craft against the hurricane wind, while his gray eyes swept the three-mile circle of the vault's base. He paled as he noted the fierce speed with which the white smoke-jets were being torn from the pipe provided for just such emergencies. His glance followed the terrific rush of the vapor. Big as a man's head, a hole glared high up on the Dome's inner surface. Feathered wisps of tell-tale vapor whisked through it at blurring speed.

"God, but the air's going fast," Darl groaned. The accident he had feared through all the months he had captained Earth's outpost on Mercury had come at last. The Dome's shell was pierced!

From The Great Dome of Mercury, by Leo Zagat.
Published by Astounding Stories in 1932
Additional resources -

Compare to the tag-alongs from Robert Heinlein's 1948 short story Gentlemen, Be Seated.

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Additional resources:
  More Ideas and Technology from The Great Dome of Mercury
  More Ideas and Technology by Leo Zagat
  Tech news articles related to The Great Dome of Mercury
  Tech news articles related to works by Leo Zagat

Smoke Jets (Air Leak Detection)-related news articles:
  - Air Leak Sensor For Spacecraft
  - Hydrogen Leak Detection By HySense
  - International Space Station Leak Plugged - With Finger

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