At  the  commencement  of  distillation  crude  wood-spirit  first
passes  over,  which  is  followed  by  quite  a  quantity  of  acetic  acid
{distilled  wood-vinegar).  Next  the  light,  and  later  on  the
heavy,  oils  pass  over,  a  pitch-like  residue  remaining  in  the  still.
By  mixing  this  residue,  while  still  tu  a  liquid  state,  with  dry
hot  sand,  blocks  may  be  shaped  from  the  mass  thus  obtained,
which  may  he  used  for  paving,  like  asphalt  blocks.  Mixed
with  culm  it  yields  a  dough-like  mass  which  may  be  utilized
for  the  manufacture  of  briquettes.  If  the  residue  cannot  be
utilized  in  any  other  manner,  it  may  be  allowed  to  run  upon
iron  plates,  and  when  cold,  is  broken  up  into  small  pieces  and
used  as  fuel  t(^ether  with  coal.
