"  It  consists  essentially  of  a  cast-iron  cylin-
der (a)  of  10  hectolitres  (220  gallons  (cubic
capacity,     A  stout  iron  tube  is  fitted  to  this


152


ANILINK


vessel,  reaching  nearly  to  the  bottom  of  the  cy-
linder. The  upper  part  of  this  tube  is  connected
with  the  machinery  (a),  while  the  surface  of
the  tube  is  fitted  with  steel  projections.  The
tube  serves  to  admit  steam,  as  well  as  acting
as  a 'stirring  apparatus.  Sometimes,  instead  of
this  tube,  a  solid  iron  axle  is  employed,  and  in
this  case  there  is  a  separate  steampipe  (d).
Through  the  opening  at  K  the  materials  for


mailing  aniline  are  put  into  the  apparatus,
while  the  volatile  products  are  carried  off
through  E.  H  serves  for  emptying  and  clean-
ing the  apparatus.  The  S-shaped  tube  con-
nected with  the  vessel  B  acts  as  a  safety  valve.
