This chapter is not summarized since it is a discussion of scientific theories of the origin and workings of the Earth’s magnetic field and the discrepancies and flaws associated with them. While the arguments show that the Dynamo Theory is far from being proven using the current accepted model of the Earth’s make-up, no significant information is given to prove that a Hollow Earth with an Inner Sun is responsible for the magnetic field. The chapter was apparently written as background material for Chapter 9, showing that present theory is not sufficient to explain the observed phenomena and to lay a foundation for theory concerning how an Inner Sun might cause the magnetic field.