Am.  Jour.  Pharm.  ) 
Jan.,  1879.  / 
Dialyzed  Iron. 
3 
adjusted  a  porcelain  filtering  basket,  6J  inches  high  and  5J  inches 
exterior  diameter  at  the  top.  It  will  be  noticed  that  this  exactly  fits 
the  percolator,  the  top  edges  of  both  vessels  standing  on  a  level.  The 
parchment  paper,  previously  well  soaked  in  water,  is  folded  at  an  angle 
of  6o°,  and  is  then  placed  in  the  basket,  to  which  it  will  fit  pretty 
well  and  without  forming  large  creases.  A  filtering  basket  of  smaller 
dimensions  may  be  used,  with  the  slight  disadvantage  that  it  is  more 
difficult  to  remove  from  the  percolator  j  and  to  replenish  the  water  a 
funnel  with  an  extra  long  neck  must  be  used.    A  wire  filtering  basket 
of  proper  dimensions  also  can  be 
used  ;  but  a  serious  defect  is,  that 
it  is  in  a  comparatively  short 
time  corroded  by  the  acid  solution 
dialyzed  from  the  iron  solution. 
To  more  easily  understand  the 
construction  of  the  dialisator  un- 
der consideration,  the  accompany- 
ing diagram  is  given. 
As  is  seen  in  the  illustration, 
the  apparatus  proper  is  adjusted  on 
a  common  filtering  stand,  but  it 
may  be  adjusted  by  any  other  con- 
venient method.  When  it  is  neces- 
sary to  replenish  the  water  the  cork 
is  withdrawn,  and  the  liquid  al- 
lowed to  flow  into  a  vessel  placed 
underneath.  When  dropping  from 
the  septum  has  ceased,  which  gen- 
erally takes  several  minutes,  be- 
cause the  water  penetrates  the  folds, 
the  cork  is  replaced  and  fresh 
water  is  poured  in  from  the  top. 
This  is  easily  done  by  pushing  the 
septum  aside  sufficiently  to  put  the 
neck  of  a  funnel  through  one  of  the 
large  openings  of  thefiltering  basket. 
Apparatus  for  Dialysis. 
One-sixth  natural  size. 
A,  percolator.  B,  porcelain  filtering  basket.  C,  portion  of  septum  projecting  from 
basket.  D,  glass  lid  to  prevent  evaporation.  E,  water  line.  F,  orifice  of  perco- 
lator closed  by  a  cork, 
