limbeck (n.)
retort, distilling apparatus, alembic
Mac I.vii.67 [Lady Macbeth to Macbeth, of the King] his chamberlains / Will I with wine and wassail so convince / That memory ... / Shall be a-fume, and the receipt of reason / A limbeck only [i.e. the part of the brain where reasons are received will be clouded]
Sonn 119.2 [] Siren tears / Distilled from limbecks foul as hell within