He got up, a fragile old body clad in dirty overalls. He beckoned Gene to follow him. He led the way to a periscope arrangement over the shielded pile. Gene peered in. It was like a look into boiling Hell. As Gene stared, the old man talked in his ear.
"Supposed to be perfectly shielded, and maybe they are. But something gets out. I think it happens in the jet assembly. A tiny trickle of high pressure steam crosses the atomic beam just above a pinhole that leads into the jet tube. It's exploded by the beam, exploded into God knows what, and the result is your jet. It's a wonderful drive, with plenty of power for the purpose. But I think it forms a strong field of static over the whole shell of the ship, a kind of sphere of reflection that throws the emanations back into the ship from every point. Just my theory, but it explains why you get these physical changes, because that process of reflection gives a different ray than was observed in the ordinary shielded jet."
Gene nodded, asked: "Can I look at the jet assembly?"
"Ain't no way to look at it! It's sealed up to hold in the expanding gases from that exploded steam. Looking in this periscope is what changed my eyes. Only other place the unshielded emanations could escape is from the jet chamber. Only way they can get back into the ship is by reflection from some ionized layer around the ship. If I could talk to some of those big-brained birds that developed this drive, I'd sure have things to say."
Gene was convinced the old man knew what he was talking about. "Why don't you try to put your information where it'll do some good? How about the Captain?"
"He's coocoo." The old man slapped the cover back on the periscope, tottered back to his perch on the platform. "He sure has changed the last two years. Won't listen to reason."
Gene squatted on the steps, just beneath the old engineer's chair. The old man seemed glad to have someone to talk to.
"It's got us trapped. And it's so well covered up from the people. Old spacers are changed physically, changed mentally. They know they can't go back to normal life, because it's gone too far. They'd be freaks. No woman would want a monstrosity around. Besides, it don't stop, even after you leave the ships. God knows what we'll look like in the end."
Gene shivered. "But you're all grown men! A fight with no chance of winning is better than this! Why do you take it?"
"Because the mind changes along with the body. It goes dead in some ways, gets more active in others. The personality shifts inside, until you're not sure of yourself, and can't make decisions any more. That's why nobody does anything. Something about those rays destroys the will. Nobody leaves the ships."