490  Petrolatum  in  the  Officinal  Ointments.  {'^°'oct"''i8^3*™' 
which  is  firmer  in  consistence  than  the  petrolatum^  having  the  higher 
melting-point.  It  is  well  adapted  for  use  in  the  firmer  class  of  medi- 
cated ointments. 
Unguentum  Acidi  Carbolici. — Ointment  of  Carbolic  ^cic/.— Car- 
bolic acid,  ten  parts ;  ointment  (made  from  petrolatum),  ninety  parts. 
Mix  them  thoroughly.  This  ointment  seems  to  have  less  tendency  to 
separate  than  that  made  by  the  officinal  23rocess ;  therapeutically  there 
can  be  but  little  difference  in  them. 
Unguentum  Acidi  Gallici. —  Ointment  of  Gallic  Acid. — Gallic 
acid,  ten  parts ;  benzoinated  petrolatum,  ninety  parts.  Use  the  offici- 
nal process.  Very  little  benefit  was  observed  when  petrolatum  was 
treated  with  benzoin  ;  the  peculiar  change  in  the  odor  of  petrolatum 
which  occurs  when  it  is  long  kept  has  been  observed  in  benzoinated 
petrolatum  almost  to  as  great  an  extent  as  in  simple  petrolatum  which 
was  exposed  for  the  same  length  of  time.  The  odor  is  undoubtedly 
modified  by  the  presence  of  the  benzoin,  but  the  petrolatum  is  not 
changed  or  protected  by  it.  This  ointment  is  undoubtedly  an  improve- 
ment on  the  officinal  one. 
Ukguentum  Acidi  Tannici. —  Ointment  of  Tannic  Acid. — Tannic 
acid,  ten  parts  ;  benzoinated  petrolatum,  ninety  parts.  Use  the  offici- 
nal process.  This  is  a  better  ointment,  therapeutically,  than  the  offi- 
cinal. 
Unguextum  Aqu.e  Ros.e. — Cold  Cream. — Petrolatum, sixty  parts; 
white  wax,  ten  parts;  rose  water,  thirty  parts.  Use  the  officinal  pro- 
cess. The  addition  of  a  small  quantity  of  oil  of  rose  improves  this 
ointment  greatly.  Although  it  would  be  probably  useless  to  attempt 
to  dispense  this  improved  ointment,  in  ordinary  counter  practice,  as 
cold  cream,  because  of  its  yellowish  color,  there  is  no  question  of  the 
superiority  of  the  petrolatum  cold  cream  as  a  practical  dressing  and 
emollient. 
Unguentum  Belladonx.e.  —  Belladonna  Ointment. —  Alcoholic 
extract  of  belladonna,  ten  parts ;  diluted  alcohol,  six  parts ;  petrola- 
tum, eighty-four  parts.  Rub  the  extract  with  the  diluted  alcohol  until 
uniformly  soft,  gradually  add  the  petrolatum  and  mix  thoroughly. 
An  improvement  over  the  officinal  ointment  therapeutically. 
Unguentum  Chkysarobini. — Chrysarobin  Ointment. —  Chrysa- 
robin  ten  parts,  petrolatum  ninety  parts.  Rub  the  chrysarobin  with  the 
petrolatum,  gradually  added,  until  they  are  thoroughly  mixed.  A 
