178  British  Pharmaceutical  Codex.  {AmAjrfI;5Xrn1, 
chalk,  add  the  soap  and  the  magnesium  peroxide  and  sufficient 
precipitated  chalk  to  take  up  the  required  weight. 
Three  external  remedies  that  will  probably  prove  useful  are: 
COMPOUND   MKTHYI,  SALICYLATE    OINTMENT,  UNGUENTUM   METHYLIS  SALI- 
CYLATE COMPOSITUM,  B.P.C. 
Methyl  salicylate  •  .  12*50 
Menthol         .  2  50 
Oil  of  eucalyptus  2*50 
Essential  oil  of  camphor  2  50 
Hydrous  wool-fat     .........   25*00 
Paraffin  ointment,  sufficient  to  produce  100*00. 
Mix. 
COMPOUND  LINIMENT  OF  BIRCH,  LINIM ENTUM  BETUL^E  COMPOSITUM,  B.P.C. 
Menthol  .  5*00 
Oil  of  eucalyptus  io'oo 
Methyl  salicylate,  sufficient  to  produce  ido*oo. 
Dissolve  the  menthol  in  the  liquids. 
LUBRICANT  PASTE,  PASTA  LUBRICANS,  B.P.C. 
Carbolic  acid  3*00 
Glycerin   .  .  10  00 
Tragacanth    ....  2*50 
Distilled  water,  sufficient  to  produce  100*00. 
Dissolve  the  carbolic  acid  in  80  of  the  water,  then  mix  the 
glycerin  with  the  tragacanth,  add  the  aqueous  solution  gradually, 
with  constant  stirring,  and  make  up  the  required  volume  by  the 
addition  o  distilled  water. 
A  preparation  of  castor  oil  that  will  serve  as  the  basis  at  least 
for  similar  peparations  is: 
AROMATIC  CASTOR  Oil,,   OLEUM  RICINI  AROMATICUS,  B.P.C. 
Amyl  acetate   0*10 
Saccharin   0*30 
Alcohol    5.00 
'  Castor  oil,  sufficient  to  produce  100  00. 
Dissolve  the  amyl  acetate  and  the  saccharin  in  the  alcohol,  then 
add  the  castor  oil. 
The  quantity  of  saccharin  in  this  preparation  can  readily  be  re- 
duced and  the  flavoring  can,  of  course,  be  changed  to  suit.  Given 
with  milk  or  from  a  wetted  spoon,  the  preparation  is  quite 
acceptable. 
