I love this. Simple, definitive, unambiguous, conclusive....and nothing more than a slide rule. :)
Yeah, it's great. It was posted here several weeks ago though, so this really is a duplicate thread.
That looks to have been made in the 1950's or early 1960's.
Looks like copyright 1962 at the beginning of the film.
The original thread that posted this talks about it a bit as I recall. I don't remember what search term might find that thread for me. I'm hoping someone reads this and remembers that thread. The original poster said something about it being part of a series and that this one was a bit more dry than the others he had watched (although everyone in that thread agreed, as I recall, that it's a great demo, showing meticulous care in checking and explaining the experimental setup).
Here's the thread. The key to finding it is to remember that Bcrowell started the thread:
Wow thanks! Bertozzi!
Ah, yes. Thank you.
Separate names with a comma.