The Measurement Register (EA-AUTHORSHIP-MEASURES-01) is the cumulative record of every number produced by the authorship investigation into the relation between the Platonic and Aristotelian corpora, entered with the conditions that produced it and with any refutation recorded beside the claim it killed. It holds §0A as its entryway and the series M1–M52: the object-conditioning result and its correction, the six-function transmission apparatus and its rival specifications, the coverage geometry that separated cleanly at full size and collapsed under size-matching, the fifteen-feature battery and the controls that destroyed each of them, the naming-gap reflex and its documented-pair comparison, the base rates that refuted earlier positional claims, and the validation check that classified two known-different authors as one. Nothing is summarised out of existence for having come out negative; struck claims stay in place with their strikes. The register keeps a boundary it records having got wrong twice: measurements belong here, while source criticism, reception history and attestation audits belong in the notebook (EA-NOTEBOOK-01). Every figure is computed against commit-pinned seated corpora, so a number cited in any derived paper can be traced to the entry that produced it and to the conditions under which it holds. It is the evidentiary basis of the technical report drawn from the same investigation, and the companion of the notebook and of the frozen pre-registration ledger.