Note 127 — Chapter XXXVII · THE THEORIES OF WEYL AND EDDINGTON

We cannot insist on numerous niceties such as the distinction between tensors and tensor-densities, etc. We may note, however, that whereas the in-magnitudes , , differ from the tensors , , and from the invariant density , 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.