Am.  Jour.  Pharm.i     Pharmaceutical  Still  and  Vapor  Condenser.  563 
Nov.,  1884.      j  x 
of  two  cylinders,  one  inside  of  the  other,  and  that  both  are  attached  to 
the  convex  top  j  the  inner  cylinder  is  mounted  on  a  rest  to  prevent  its 
weight  from  dragging  down  the  common  top.  This  inner  cylinder  contains 
the  menstruum,  a,  to  be  distilled,  or  the  alcohol  to  be  recovered,  which 
can  be  introduced  at  any  time  through  the  funnel,  /.  Attached  to  it  from 
the  top  and  reaching  to  its  bottom  is  the  gauge,  d,  through  which  the  height 
of  its  contents,  a,  is  seen .  At  the  bottom  of  the  gauge  and  connected  with 
it  is  a  faucet  to  draw  the  contents  off  at  any  time.  The  outer  cylinder, 
which  serves  both  as  a  joint  steam  and  water-bath,  contains  water,  b,  con- 
nected with  the  water-gauge,  c,  which  indicates  the  volume  contained 
in  it ;  a  faucet  attached  to  the  lower  end  of  it  serves  to  draw  off  the 
water  as  needed.  Attached  to  the  top  of  the  outer  cylinder  is  a  steam 
valve,  g,  by  which,  if  lifted,  the  steam  may  escape  without  pressure,  or, 
if  weighted,  may  be  made  to  assume  any  desired  pressure.  The  inner 
cylinder  connects  at  h,  by  a  screw-joint  and  gum  packing,  with  a  bent 
pipe,  which  in  turn  can  be  attached  to  a  large  copper  Liebig's  con- 
denser, such  as  I  here  exhibit,  or,  instead,  to  one  of  Prof.  Remington's 
condensers,  if  so  desired. 
