text: * gas silvestre
  **Ancient origin for fixed air by Jan Baptist van Helmont
  *Spiritus sylvestris
  *aerial acid
  *acid of air
  *luft-saeure
  *carbonic anhydride
  *Gas acide carbonique
  *Gas carbonicum
  *chalky acid
  *acid of chalk
  *kriedesaeure
  *kohlensaeures gas
  *choke-damp
  *cretaceous acid
  *Acide mephitique
  *Mephitic air
  *deutoxide of carbon