Copper is cheaper than silver and, next to silver, is the best conductor of electricity.
Although the supply of copper in the world is very large, our uses are so great that we should not waste copper. Some thieves who broke into a house found only a rooster. The rooster begged them not to take him because he was useful in waking up the owners of the house to get them to work. The thieves told him that he interrupted their work by waking the owners, and they took the bird. Life consists of a sequence of difficult tasks satisfactorily accomplished.