2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/139117We derive the probabilities of measurement results from Schroedinger's equation plus a definition of macroscopic as a particular kind of thermodynamic limit. Bohr's insight that a measurement apparatus must be classical in nature and classically describable is made precise in a mathematical sense analogous to the procedures of classical statistical mechanics and the study of Hamiltonian heat baths.See http://www.mast.queensu.ca/~jjohnson/axiomatics.html for larger context and later commentsQuantum Physicstext