Am'jine!,i9oh2arm'}      Exhaustion  of  Watery  Liquids.  279 
VI.  ADMINISTRATION. 
As  I  have  stated,  the  product  is  entirely  unobjectionable  to  sight, 
taste  or  smell.  It  is  absolutely  non-irritant  when  taken  by  the 
mouth.  It  should  be  administered  in  solid  form,  either  as  powder 
mixed  with  two  parts  of  sugar,  or  as  chocolate  tablets.  The  dose, 
as  with  other  preparations  of  this  class,  would  be  about  I  gm.  per 
day. 
EXTRACTION  APPARATUS  FOR  THE  EXHAUSTION  OF 
WATERY  LIQUIDS  BY  IMMISCIBLE  VOLATILE 
SOLVENTS. 
By  ToraIvD  Soi/cmann,  M.D. 
(From  the  Pharmacological  Laboratory  of  Western  Reserve  University, 
Cleveland,  O.) 
The  use  of  the  separatory  funnel  for  the  exhaustion  of  watery 
liquids  by  immiscible  solvents  has  some  objectionable  features  when 
the  desired  substances  are  but  slightly  more  soluble  in  the  extra- 
hent  than  they  are  in  water.  The  extraction  must  then  be  fre- 
quently repeated,  and  very  large  quantities  of  the  expensive  sol- 
vents are  lost  in  the  manipulations.  These  difficulties  may  be 
avoided  by  making  the  extraction  continuous,  employing  some 
adaptation  of  the  Soxhlet  apparatus.  The  form  which  is  here 
described  is  a  simplification  of  a  more  expensive  apparatus  which 
I  have  seen  used  abroad,  but  which  appears  to  be  unknown  in  this 
country.  I  do  not,  of  course,  lay  any  claim  to  originality  as  to  the 
principles  of  its  construction. 
The  apparatus  as  modified  is  illustrated  in  the  figures,  which  are 
drawn  to  scale  and  which  are  largely  self-explanatory.  L  is  for  use 
with  extrahents  lighter  than  water,  H  for  those  heavier  than  water. 
The  wider  tubes  have  an  external  diameter  of  T7^-  inch,  the  nar- 
rower of  inch. 
When  the  apparatus  is  to  be  used,  a  100  c.c.  or  250  c.c.  flask 
charged  with  30  c.c.  or  100  c.c.  of  the  solvent  is  attached  at  F. 
This  flask  is  tared  if  a  quantitative  determination  is  to  be  made; 
10  c.c.  of  the  solvent  are  then  poured  into  the  expanded  funnel- 
tube,  followed  by  the  watery  liquid  which  is  to  be  exhausted.  The 
apparatus  should  be  slanted  so  that  none  of  the  solution  escapes 
th  rough  b.    The  watery  liquid  should  not  extend  beyond  the  point 
