Secondly, The branches of Plants have been us'd in religious Purgations or Expiations. In the Moſaical Law there was one general kind of Sacrifice commanded for Purgation, which conſiſted of an Heifer ſacrificed and burnt to Aſhes; with which, and ſpring water, a Lee was made to ſerve for many ſorts of Purgations.