In days of old, shot for rifles was made in the "Shot Tower." Molten lead was dropped from the top of the tower into a vat of water at the bottom. The lead droplets, like raindrops, would form into perfect spheres, cool and solidify as they fell into the cooling water vat below.
Phoenix Shot Tower
MathTeacher
@ 2013-09-04 18:48:20
I have visited this shot tower a few times over the years each time I am in Baltimore. There is an NRHP site to the right rear of this site. We also have a shot tower of our own in Philadelphia, not nearly popular or 'touristy' as this one.