Could somone tell me what this is?

[Cerium]

Hey! I would love it if somone could tell me what this is. I got some old stuff from a school and this is the only thing I don't know what it is or what it is for.

Thanks a lot!

 

[hotwaterwizard2]

My educated Guess?
An Electromagnet to demonstrate how Magnitisum works.

 

[Aan]

Maybe it is an electromagnetic induction model or transformator model. I am not sure.

 

[mvs sarma]

Hi
This is rightly said to be a mutual inductance demo kit

 

[nutmegzzzz]

I saw items like this of all sizes when I worked for the navy.  Not sure what they're called but they are used for EM interference testing.  They come in all sized to inches all the way up to large room sized