SEVERAL  MODES  OF  ADMINISTERING  OLEUM  MORRHU2E.  273 
distilled  water  from  time  to  time,  so  that  this  part  may  be  covered 
during  the  boiling,  and  thus  be  continually  in  contact  with  the 
ammoniacal  solution.  As  soon  as  ammonia  ceases  to  be  disen- 
gaged, let  the  liquid  get  quite  cold,  and  if  the  addition  of  water 
does  not  cause  it  to  become  turbid,  dilute  it  with  that  liquid. 
Then  filter  the  liquid,  and  precipitate  it  in  a  capsule  by  means 
of  an  excess  of  caustic  soda  solution. 
Collect  by  means  of  gentle  heat,  the  glutinous  precipitate  at 
the  bottom  of  the  capsule,  then  descant  the  clear  alkaline  liquid, 
and  wash  the  precipitate  of  quinoidine  several  times  in  distilled 
water.  Then  expose  the  still  glutinous  quinoidine  thus  purified 
for  some  time  to  a  temperature  of  100°  to  110°  C,  which  will 
thus  lose  the  little  water  it  retained,  and  finally  become,  when 
cold,  hard  and  friable.  Oxalate  of  ammonia  is  used  for  the 
purpose  of  getting  rid  of  the  lime  usually  contained  in  commer- 
cial quinoidine. — The  Drug.  Oir.  and  Ohem.  Craz. 
ON  THE  SEVERAL  MODES  OP  ADMINISTERING  OLEUM 
MORRHUiE. 
By  Joseph  Adolphus,  M.  U. 
Cod  oil  to  many  stomachs  is  exceedingly  nauseous,  and  it  is 
with  difficulty  that  such  persons  are  induced  to  take  it.  This 
is  particularly  so  of  the  darker  shades  of  the  oil.  Often  it  is  a 
severe  task  on  the  physician  to  devise  ways  and  means  whereby 
an  intolerant  stomach  may  be  induced  to  retain  it. 
The  greatest  objection  I  have  encountered  is  the  complaint 
many  persons  make,  that  they  "  taste  the  oil  for  a  long  time  after 
taking  it."    This  is  induced  by  three  causes.     1st,  a  deep 
seated  prejudice  against  the  oil.    2d,  a  singular  state  of  the 
nervous  coat  of  the  stomach,  which  prevents  the  digestion  of 
the  oil ;   and  3d,  from  idiosyncrasy.    The  first  is  overcome 
by  persistence,  cautious  management  and  small  doses  of  the 
oil.    I  have  often  commenced  on  five  drops  of  oil  three  times 
a  day,  increasing  by  one  or  more  drops  on  each  occasion  till  I 
have  got  the  stomach  accustomed  to  and  tolerate  the  oil  in  §ss. 
doses.    Three  cases  in  particular,  delicate  females,  who  so 
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