ere are some gadgets you can puzzle over:

There was a light fixture that you put against any part of a wall—no screws, no cement, no wires, even—and it held there and lit up, and it stayed lit no matter where you moved it on the wall. Talk about pin-up lamps ... this was really it!

Then I came across something that looked like an ashtray with a blue electric shimmer obscuring the bottom of the bowl. I lit my pipe—others I'd passed had been smoking, so I knew it was safe to do the same—and flicked in the match. It disappeared. I don't mean it was swirled into some hidden compartment. It vanished. I emptied the pipe into the ashtray and that went, too. Looking around to make sure nobody was watching, I dredged some coins out of my pocket and let them drop into the tray. They were gone. Not a particle of them was left. A disintegrator? I haven't got the slightest idea.

There were little mirror boxes with three tiny dials on the front of each. I turned the dials on one—it was like using three dial telephones at the same time—and a pretty girl's face popped onto the mirror surface and looked expectantly at me.

"Yes?" she said, and waited for me to answer.

"I—uh—wrong number, I guess," I answered, putting the box down in a hurry and going to the other side of the shop because I didn't have even a dim notion how to turn it off.

The thing I was looking for was on a counter—a tinted metal box no bigger than a suitcase, with a lipped hole on top and small undisguised verniers in front. I didn't know I'd found it, actually, until I twisted a vernier and every light in the store suddenly glared and the salesman came rushing over and politely moved me aside to shut it off.

"We don't want to burn out every appliance in the place, do we?" he asked quietly.