[urq] [s-cars] NAC, thoughts on copper prices

[n-engelbert at terrans.net]

> You sure its was that late? I was thinking it was somewhere in the 60's. I
> remember when I was young we tried melting penny's in the fire and you
> could melt the zinc ones but the solid copper ones would just glow red.
>
> Elijah

In high school chemistry class c. 1995, one "experiment" we did was to
take a bag with 10 pennies, take their mass, and based on the mass of a
bag of 10 pre-1982 pennies, and a bag of 10 post 1982 pennies, determine
the number of pre and post 1982 pennies in the bag.

So, something changed in 82, and I thought it was that the pre-1982
pennies were all or mostly copper.

Nathan