Make a penny shell with muriatic acid

PopSci has a fun project that shows you how to dissolve the zinc in a penny, leaving only the thin copper shell. Link

[#1 posted by Anonymous , March 6, 2008 3:27 AM]

funny thing about this is that before 1982 they were made from all copper see here, http://coins.about.com/od/uscoins/f/copper_to_zinc.htm
so much for sound money.