AjaiT;^72RM'}         Pharmaceutical  Processes,  etc.  5 
percolator,  adapted  to  a  receiving  bottle,  and  percolated  with  alcohol 
till  nearly  4  pints  of  tincture  were  obtained,  care  being  taken  to  dis- 
place the  last  part  of  the  alcohol  by  water.  To  obviate  the  inconve- 
nience of  holding  a  percolator  with  one  hand  while  filling  and  pack- 
ing it  with  the  other,  George  M.  Dougherty,  a  member  of  the  present 
class,  has  devised  the  instrument  here  figured,  which  is  an  improve- 
ment upon  one  invented  by  T.  C.  Conard,  of  last  year's  graduating 
♦class. 
"  The  Manipulator"  consists  of  two  funnels  of  zinc,  one  fitting  over 
the  other  at  the  smaller  end,  and  a  ring,  with  three  springs  attached, 
fitting  securely  over  the  outer  one.  A  conical  percolator  is  held  in 
place  while  being  packed,  by  the  shape  of  the  funnel ;  but  when  a 
cylindrical  percolator  is  used,  the  springs  are  slipped  on,  and  hold 
the  percolator  in  a  vertical  position  while  it  is  being  packed,  and 
afterwards  if  desired. 
The  larger  funnel  has  an  opening  by  which  a  receiving  vessel  can 
be  introduced  under  the  percolator,  held  in  position  above  ;  or  an 
axgand  burner,  may  be  placed  in  it,  and  an  evaporating  dish,  con- 
taining a  liquid  to  be  evaporated,  on  the  upper  funnel. 
The  recovery  of  the  alcohol  from  the  tincture  of  nux  vomica  was 
accomplished  by  the  use  of  the  pharmaceutical  still,  with  water-bath 
attachment,  here  figured. 
This  differs  from  Procter's,  figured  in 
Parrish's  Pharmacy,  3d  edition,  p.  297, 
in  having  a  water-bath,  C,  into  which 
the  condenser,  B,  fits  by  a  water-joint. 
There  should  also  be  a  water-joint  on  the 
outer  vessel,  A.    The  tincture  being  in- 
Combination  Still. 
