Make 612
Producing cold with electricity and a “Quicksilver Heart” that beats – from Popular Science 1936…

You are accustomed to seeing an electric element in a toaster or radiant heater grow red-hot when current passes through it–but did you know that when electricity flows through joints of certain metals, it produces a cooling effect? Have you ever made a drop of murcury behave as if it were alive or prepared a pair of magical alloys that are solids when separate, and a liquid when mixed?

These are a few of the fascinating experiments that you can perform with metals, using three in particular that you may not have employed before in your home laboratory–mercury, antimony, and bismuth.

Modern Mechanix » Three Magic Metals – Link.