Abstract
One of the most widely accepted emendations in Lucretius has been the change by Lambinus in 2.289 of the manuscript reading res to mens. For instance, of the major editors since Lachmann only Bockemüller, Merrill in his 1917 edition, and Martin in his Teubner editions have printed res. Also, few emendations in Lucretius are of equal significance for Epicurean doctrine because, as will be shown, some conclusions of important recent scholarship depend on the acceptance of the reading mens.