, yet
, the tensor of the electric and magnetic forces, is the same as in Einstein’s theory. This is because
in Einstein’s theory already happened to be an in-tensor.
[128] Eddington has shown that the discrepancies which might be expected to arise would in all probability be too small to be observed.
[129] See note, [page 354].
[130] When suitable units are chosen.
[131] J. S. Mackenzie.
[132] In Poisson’s case the argument had some weight, for there was reason to suppose that were Fresnel’s views justified, we should at some time or other have observed bright shadows in the course of our daily experience.