Another  form  of  disinfecting  chamber  is
that  invented  by  Dr  Esse,  of  Berlin,  and  em-
ployed in  that  city.  The  apparatus  consists
of  two  iron  cylinders,  one  fitted  within  the
other,  with  a  Bpiiec  between,  into  which  steam
under  pressure  is  introduced.  The  outer
cylinder  is  surrounded  with  wood  and  the  top
with  felt,  to  prevent  the  escape  of  heat.  The
articles  to  be  disinfected  are  put  in  at  the  top
of  the  inner  cylinder,  the  inside  of  which  soon
becomes  heated  up  by  the  surrounding  steam.
A  pulley  is  used  to  lift  the  lid  of  the  inner
cylinder,  ai-ound  which  the  clotbes  are  hung
on  pegs,  not  being  allowed  to  touch  the  side
of  tlie  cylinder.  At  the  top  of  the  inside
cylinder  is  a  briiss  box  pierced  with  holes  at
the  bottom,  which  dips  a  little  way  down,
through  which  the  air  from  the  interior  can
rise.  In  this  box  the  bulb  of  a  thermometer
being  placed,  the  temperature  of  the  inner
chamber  eau  be  registered.
When  the  steam  condenses  in  the  apace
between  the  cylinders  it  is  carried  off  by  means
of  a  valve,  which  is  lifted  when  the  water
reaches  a  certain  point  in  the  condenser.  In
an  hour's  time  the  tempernture  of  the  interior
cylinder  can  be  raised  to  235°  Fahr.
For  heating  inattrasso'i  another  apparatus
has  been  devised  by  Dr  Esse.  It  consists  of
an  iron  case  with  a  spiral  steam  pipe  in  the
centre,  the  steam  inside  the  pipe  being  com-
pressed to  two  atmospheres.
