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> Gold and mercury form an amalgam

Sure, but if you have a sufficient amount of mercury, that amalgam will remain invisible to the eye as Mercury is not translucent - and you can just write "mercury" on the flash and you can be sure no-one will dare to touch it.




WWII-era soldiers may not have been as fearful of the fun that is mercury as we are today.


> you can just write "mercury" on the flash and you can be sure no-one will dare to touch it.

Remember we're talking about 1940. Whoever discovered it might very well take it off the shelf to play with it. ;)


Oh, Mercury poisoning has been known for a very, very long time, and certainly well documented since the late 1800s.

https://en.wikipedia.org/wiki/Mercury_poisoning


And yet my parents (both born in the 1960's) both played with beads of mercury on their desks in school on numerous occasions... It was pretty common


When I was at school (1980s) the teacher had us line up and put our fingers in a flask of mercury. It was a very peculiar sensation. I probably wouldn't want to repeat that "experiment" today.


Sure, I'm not saying the general knowledge of mercury poisoning was commonplace back then, but in the scientific community it was, I believe, well known already.


It was the Nazi soldier community they were worried about.


Mercury poisoning has been known for some time, however people in the general public knowing or caring about mercury poisoning is a pretty recent phenomenon.




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