The Transfer of Heat From the Core of the Earth

The dynamo theory of the origin of the magnetic field of the Earth requires a motion of the material of the core. This paper discusses the possibility that the motion is due to thermal convection. Too little is known of the core for a definite answer to be obtained. It is shown, however, that reasonable values of the constants involved will give convection. The main difficulty is to arrange for removal of the heat from the outside of the core.