Machines have, in fact, become the salves of modern life.You wake, perhaps, to the hoot of a siren by a machine in a neighboring factory.You wash in water brought to you by the aid of machinery, heated by machinery and placed in basins for your convenience by a machine.And if you are lucky to be in a very modern school, you enjoy cinema where a machine teaches you or you listen to lessons broadcast by one of the most wonderful machines.