I am currently studying the early Disney educational projects, in the context of my upcoming monograph about The Origins of Walt Disney's True-Life Adventures.  Which is how I stumbled onto this spread released in the July 27, 1943 issue of Look Magazine.

The article mentioned a movie about the electron that the Disney Studio was working on at the time, which intrigued me. I have now established that what the article was referring to is the third part of the Minneapolis-Honeywell training film, which you can discover at this link.

There is a lot more to this story, which eventually led to the making of Our Friend the Atom. More on this next year in the monograph :-)