^""jin^'iss^""  }  Tincture  of  ^illaia  as  an  Emulsifying  Agent.  43 
This  forms  an  excellent  emulsion,  and  with  the  addition  of  syrup, 
zingiberis,  ^ss,  constitutes  the  Mistura  Filicis  Maris  of  Guy's  Hospital. 
Copaibas,  .  .  .  •  • 
Tinct.  quillaiae,  .  ....  S^^s 
Aq.  destil  ,  .  .  .  .  ad  ^^i 
Misce. 
The  copaiba  in  this  mixture  is  perfectly  emulsified. 
Here  is  an  example  of  an  essential  oil: 
01  terebinth.,      .  ....  "I'^x 
Tinct.  quillaiae,  .... 
Aq  destil.,  .  .  .  .  ad 
Misce. 
This  formula,  with  the  addition  of  tinct.  limonis,  is  the  mistura 
terebinthinae  (Guy's). 
I  have  found  that  resinous  tinctures  require  more  than  their  bulk  of 
tinct.  quillaiae  to  prevent  any  separition  of  resin. 
Tinct.  tolut.,       .....  TTL40 
Tinct.  quillaiae,  .  .  .  •  3i 
Aq.  destil  ,  .  .  .  .  ad  51 
Misce. 
The  resin  deposits  after  some  time,  but  upon  shaking  it  is  easily 
diffused. 
This  mixture  contains  the  soluble  matter  of  12  grains  of  guaiacum 
resin  in  every  fluidounce,  so  that  it  is  about  the  same  strength  as  mist> 
guaiaci.,  B.  P.    The  following  is  the  formula: 
Resin,  guaiaci,  .  .  .  .  .    gr.  xii 
Tinct.  quillaiae,  .  .  .  •  5i 
Aq.  destil.,        .  .  .  .  ad  .^i 
Dissolve  the  guaiacum  in  the  tincture,  filter,  and  then  mix  with  the 
water. 
Resin  of  copaiba  is  largely  used  at  Guy's  Hospital,  where  it  is  con- 
sidered a  valuable  diuretic.  It  does  not  appear  to  me  to  make  so  per- 
fect a  mixture  with  tinct.  quillaiae  as  the  Hospital  formula  with  pulv. 
tragacanth  co.  The  liquid  is  not  thick  enough  to  prevent  the  resin 
separating  too  rapidly.  Here  are  mixtures  of  copaiba  resin  made  after 
the  following  formulas: 
Mht.  Resina  Copaihcs  {Guy^s). 
Resin  of  copaiba,       .  .  ,  -15  grains 
Rectified  spt.  of  wine,        .  .  .  20  ir.inims 
Compound  powder  of  tragacanth,  .  .15  grains 
Syrup  of  ginger,  .  .  .  i  fl.  dr. 
Distilled  water  to  ,  .  .  .     i  fl  oz. 
Misce. 
