Complex sentence: A column still, also called a continuous still, patent still or Coffey still, is a variety of still that consists of two columns invented 1826 by Robert Stein, a Clackmananshire distiller, but it was enhanced and patented in 1831 by the Irishman Aeneas Coffey.
Split into simpler sentences: A column still, also called a continuous still, patent still or Coffey still, is a variety of still that consists of two columns invented 1826 by Robert Stein, a Clackmananshire distiller. The desgign was enhanced and patented in 1831 by the Irishman Aeneas Coffey.