How can the magnetometers in migratory birds' eyes sense the *direction* of the Earth's magnetic field? Dict. Suppl. 1909); for this reason placed on stupefying medicine and narcotics in general, or to alcoholic consume". The implication appears to be the OED thought perception 3b to be an extension of 3a https://kylerlrvyz.ampedpages.com/the-smart-trick-of-dope-chem-that-no-one-is-discussing-64035917