I came across these scans via Ffffound a few days ago, and traced them back to Steve Roden’s Flickr, specifically this set simply entitled Science. I couldn’t find larger images so please pardon the poor quality.
I have no idea what these images were originally used for, perhaps a university science textbook from the 1960s?
Strangely enough, they were all used for my Bar Mitzvah. Please don’t ask me to explain.