Well, here it is. I told Morgan to put it in a lead box till we had a chance to test it for radioactivity.
6 seconds sound clip from Superman (1948) - The Reducer Ray (Chapter 3).
You can hear this line at 00:16:24.817 in the Blu-ray version of the episode.
Quote context
[...]
- That's funny. It steers all right.
- Just the same. You better go out and see.
- I think it's the right rear.
- Professor Leeds. Did you find the meteor?
- He probably stepped out to get something to eat. He missed his supper because of the meteor hunt.
- Morgan has already made a test. The meteorite contains nothing dangerous to us.
- Is there anything wrong, Mr. Kent?
- I don't know. I don't think so, please go on.
- Now, you'll see what I mean when I say this meteorite is different.
[...]