Am.  Jour.  Pharm. 
June,  1878. 
Emulsiones  Oleosa. 
287 
liver  oil,  turpentine  and  castor  oil  separated  on  standing  for  twelve 
hours,  not  showing  any  separated  oil  globules  floating  on  top,  but  two 
distinct  layers,  the  upper  one  of  which  still  retained  the  appearance  of 
a  perfect  emulsion,  while  the  lower  one  was  thinner  and  lighter  in 
color  ;  shaking  slightly  again  mixed  them  perfectly.  This  proves  that 
31  of  gum  arabic  to  the  ounce  of  oil  will  only  answer  satisfactorily  when 
the  emulsion  is  to  be  used  in  a  short  space  of  time. 
5.  An  emulsion  made  by  shaking  together  in  a  bottle  equal  parts  of 
codliver  oil  and  of  the  officinal  mucilage  of  gum  arabic  was  a  perfect 
success,  not  separating  in  the  least.  After  standing  for  three  weeks 
and  two  days,  a  separation  into  layers  slowly  commenced. 
6.  Cod-liver  oil,  f^i,  the  yolk  of  one  egg  and  f^vi  of  aq.  dest., 
mixed  intimately  by  trituration,  yielded  a  yellowish-white  perfect  emul- 
sion, which  could  be  diluted  without  separation,  and  remained  unchanged 
for  seven  hours.  It  then  separated  into  two  layers,  which  reunited  on 
shaking.  Oil  emulsions  made  by  any  of  the  mentioned  processes  will 
bear  dilution  with  water,  and  the  addition  of  syrups  or  tinctures  after 
being  perfectly  combined. 
7.  Parrish's  formula  for  codliver  oil  mixture  reads  as  follows  :  Take 
of  codliver  oil  f^vi,  lime-water  gix.  To  the  lime-water  in  a  pint 
bottle  add  the  oil,  and  shake,  etc.  I  mixed  fgvi.  of  cod-liver  oil  and 
f^ix  of  lime-water,  and,  after  considerable  incessant  shaking,  obtained 
a  very  satisfactory  emulsion,  containing  40  per  cent,  of  codliver  oil, 
which  remained  unaltered  for  five  days.  It  then  commenced  to  sepa- 
rate into  two  layers,  the  upper  one  in  this  case  consisting  of  a  small 
amount  of  oil,  while  the  lower  one,  which  was  at  least  j-J-  of  the  whole 
mixture,  still  appeared  to  be  a  perfect  emulsion.  But  very  little  shaking 
was  required  to  reunite  them. 
8.  Experiments  made  with  different  formulas  for  "  Emulsion  of 
codliver  oil  and  lacto-phosphate  of  lime,"  gave  me  the  following 
results  :  By  following  the  directions  of  the  formula  published  by  Mr. 
Shinn  ("Amer.  Jour,  of  Pharm.,"  March,  1873,  P-  x35)  ^  obtained  a 
nicely  flavored  emulsion.  An  attempt  to  mix  the  oil,  water  and  gum  in 
his  proportions  by  throwing  them  together  into  a  mortar  and  triturating 
them  well,  proved  equally  successful  ;  the  emulsion  in  this  case,  how- 
ever, separated  after  standing  for  24  hours,  there  being  a  narrow  layer 
of  oil  visible  floating  on  top  of  the  emulsion.  Shaking  in'this  case  also 
reunited  them. 
