Given that the aether has been introduced to explain phenomena at the atomic and microscopic level the question of its role on a large scale comes into issue. Here, from the very early stage of development of this theory, I could see that one had only to ask the question of how a large sphere of aether set in rotation would respond given that sychronized co-ordination of its aether lattice particle motion to reveal a feature that proved its very existence. Hence this chapter 8 is important.
A large sphere of aether, typically of the size of Earth, if rotating will develop a radial electric displacement about its spin axis. Conversely a radial electric field set up by a large spherical body of matter will induce spin in co-extensive aether. Thus one could explain how the Sun is created in a state of spin and why Earth has a magnetic field. In particular, without making further assumptions, the data already derived for the aether properties from analysis of the topics dealt with in previous chapters, notably chapter 6, could be applied here in chapter 8 to estimate the value of the geomagnetic moment. This result was a very convincing outcome of the theory. It had been the subject of chapter 5 in the 1960 booklet 'The Theory of Gravitation' and it meant that the theory could prevail over non-aetherial physical models. It has no rival in Einstein's theory and little more need be said.