156  Emulsions  of  Cod-Liver  Oil.  {^JRiS? 
use  of  the  brandy,  on  account  of  the  alcohol  which  it  contains  being 
capable  of  precipitating  the  gum  from  solution.  This  can  be  obvi- 
ated in  a  great  measure  by  adding  it  last.  It  has,  however,  the  pro- 
perty of  preserving  it  for  a  length  of  time. 
An  emulsion  is  by  far  the  best  method  of  incorporating  cod-liver  oil 
with  other  medicines.  Iron  is  often  introduced.  This  is  easily  done  by 
adding  a  soluble  salt  to  the  mixture.  In  the  following  formula  a  con- 
centrated solution  of  pyrophosphate  of  iron  is  used,  which  keeps 
well,  and  is  a  very  useful  addition  to  our  list  of  cod-liver  oil  mixtures. 
It  is,  I  think,  one  of  the  easiest  and  most  convenient  ways  of  admin- 
istering iron  in  combination  with  cod-liver  oil,  and  is  much  liked  by 
those  who  in  their  practice  have  had  occasion  to  use  it : 
Cod-liver  Oil  in  Combination  with  Iron. 
Ify.    Pulv.  Acacise,         .  .  .  .  3i, 
Pulv.  Sacch.  Alb.,        .  .  .  ^ss, 
Aquae,        .....  3iv, 
Alcohol,  .  .  .  .  %\y 
01.  Morrhuse,         .  .  .  .  3v, 
Sol.  Ferri  Pyrophosph.,  .  .         gtt.  cc, 
01.  Amygdal.  Amar.,  .  .  .    gtt.  v. 
M.  ft.  emuls. 
A  new  preparation  of  cod-liver  oil  has  recently  come  under  the 
attention  of  physicians  and  pharmacists,  namely,  that  of  lacto-phos- 
phate  of  lime  and  cod-liver  oil.  The  most  advantageous  manner  of 
preparing  this  is  a  matter  of  dispute.  I  have  found  the  following  to 
answer  all  the  purposes  indicated  : 
Lacto-phosphate  of  Lime  and  Cod-liver  Oil. 
i^.    Pulv.  Acacise,         .  .  .  .  ^i, 
Pulv.  Sacch.  Alb.,        .  .  .  ^ss, 
Liquor.  Calcis,        ....  §iii, 
Alcohol,  .  .  .  .  3i, 
01.  Morrhuse,  .  .  .  .  gi, 
Sol.  Calcii  Lacto-phosph.,         .  .  q.  s. 
01.  Gaultheriae,     ....  gtt.  v.  M. 
In  the  above,  lime-water  is  substituted  for  water,  to  neutralize  any 
excess  of  lactic  acid  in  the  solution  of  lacto-phosphate  of  lime.  This 
often  gelatinizes,  on  account  of  the  sucrose  being  converted  by  the 
