190 
Galenical  Preparations. 
f  Am.  Jour.Pharnfc. 
\      April,  1883. 
Unguenta. — The  ingredient  having  the  higher  melting  point  is 
fased  by  itself  or  with  the  addition  of  a  small  portion  of  the  more 
readily  fusible  ingredient,  then  the  latter  is  added  in  small  quanti- 
ties, care  being  taken  not  to  increase  the  heat  unnecessarily.  Oint- 
ments consisting  of  wax  or  resin  and  lard  or  oil,  when  melted, 
require  to  be  continually  stirred  until  cool;  watery  substances  are  to 
be  incorporated  while  cooling ;  powders  should  be  very  fine,  if  neces- 
sary elutriated,  and  should  be  triturated  with  a  little  oil  or  melted 
ointment ;  extracts  and  salts  should  be  triturated  with,  or  dissolved 
in,  water,  except  tartar  emetic,  which  must  be  rubbed  to  a  very  fine 
powder  before  being  incorporated. 
The  ointments  of  the  German  Pharmacopoeia  embrace  also  prepara- 
tions of  the  consistence  of  cerates,  as  recognized  by  the  U.  S.  Pharma- 
copoeia. 
Unguentum  Cantharidum. — Coarsely  powdered  cantharides  2  parts,, 
olive  oil  8  parts ;  digest  for  ten  hours  in  a  steam  bath,  express,  filter,, 
and  to  7  parts  of  the  filtrate  add  yellow  wax  3  parts. 
Unguentum  Glycerini. — Powdered  tragacanth  1  part,  alcohol  5  parts ; 
triturate  together,  mix  with  glycerin  50  parts  and  heat  in  a  steam 
bath  until  the  mixture  forms  a  uniform,  white  and  diaphanous  mass. 
Unguentum  Paraffini. — Paraffin  1  part,  paraffin  oil  4  parts.  White, 
diaphanous,  melting  between  35°  and  45°  C. ;  showing  minute  crystals 
under  the  microscope. 
This  is  evidently  intended  as  a  substitute  for  the  soft,  jelly-like 
paraffins,  which  are  found  in  the  market  under  various  names.  That 
formulas  like  this  one  are  entirely  impracticable  has  been  shown  in 
1873  and  1875  by  Dr.  A.  W.  Miller  and  Mr.  J.  L.  Lemberger. 
Unguentum  Plumbi. — Lard  92  parts,  solution  of  subacetate  of  lead  8 
parts. 
Unguentum  Plumbi  tannici. — Tannin  1  part,  solution  of  subacetate 
of  lead  2  parts ;  triturate  to  a  uniform  pulpy  mass  and  mix  with  lard 
17  parts. 
Unguentum  Rosmarini  compositura. — Lard  16  parts,  suet  8  parts, 
yellow  wax  and  expressed  oil  of  nutmeg  each  2  parts;  to  this  add  oil 
of  rosemary  and  oil  of  juniper  each  1  part.    It  is  yellowish. 
Unguentum  Tartari  stibiati. — Tartar  emetic  2  parts,  paraffin  oint- 
ment 8  parts. 
