"^""■od^^iss?^"^"}        Petrolatum  in  the  Officinal  Ointments.  489 
cerate  of  sub-acetate  of  lead,  and  when  made  from  petrolatum  is  more 
permanent  than  the  officinal.  A  better  and  simpler  formula,  in  some 
respects,  is  as  follows :  Powdered  camphor,  one  part ;  petrolatum,  ten 
parts ;  cerate  (made  from  petrolatum),  one  hundred  and  eighty-nine 
parts.  Warm  the  petrolatum  until  it  liquefies,  then  dissolve  the  cam- 
phor in  it  and  incorporate  with  the  cerate. 
Ceratum  Cantharidls. —  Cantharides  Cerate. — Cantharides,  in 
No.  60  powder,  thirty-five  parts ;  yellow  wax,  twenty  parts  ;  resin, 
twenty  parts ;  petrolatum,  twenty-five  parts.    Use  the  officinal  process- 
Ceratum  Cetacei. — Spermaceti  Cerate. — Spermaceti,  ten  parts; 
yellow  wax,  twenty-five  parts;  petrolatum,  sixty-five  parts.  Melt 
together  the  spermaceti  and  wax,  then  add  the  petrolatum  and  stir  the 
mixture  constantly  until  cool.  Not  white,  but  much  more  permanent 
than  the  officinal. 
Ceratum  Extracti  Cantharidis. — Cerate  of  Extract  of  Can- 
tharides.— Cantharides,  in  No.  60  powder,  thirty  parts ;  resin,  fifteen 
parts;  yellow  wax,  thirty-five  parts;  petrolatum,  thirty-five  parts; 
alcohol,  a  sufficient  quantity.    Use  the  officinal  process. 
Ceratum  Plumbi  SuBACETATis. —  Goulard,^s  Cerate. — Solution  of 
subacetate  of  lead,  twenty  parts ;  camphor  cerate  (made  from  petrola- 
tum), eighty  parts.  Mix  them  thoroughly.  This  cerate  is  more  per- 
manent than  the  officinal  and,  in  practice,  will  be  found  to  be  very 
efficient  in  alleviating  acute,  active,  cutaneous  inflammation,  at  times 
being  successful  when  the  officinal  ointment  does  not  afford  immediate 
relief.    It  is  yellowish-white  in  color. 
Ceratum  Resix^. — Resin  Cerate. — Pesin,  thirty-five  parts ;  yel- 
low wax,  fifteen  parts ;  petrolatum,  fifty  parts.  Melt  together  at  a 
moderate  heat,  strain  through  muslin,  and  allow  it  to  cool  without 
stirring.  The  substitution  of  petrolatum  in  this  cerate  is  probably  not 
much  of  an  improvement  from  a  therapeutic  point  of  view,  as  stimu- 
lation is  the  object  sought ;  it  would  however  not  be  objectionable. 
When  made  without  stirring,  a  semi-translucent  handsome  ointment  is 
produced. 
Ceratum  Sabin^e. — Savine  Cerate.  —  Fluid  extract  of  savine, 
twenty-five  parts ;  resin  cerate  (made  from  petrolatum),  ninety  parts. 
Use  the  officinal  process. 
Unguentum  — Ointment. — Petrolatum,  eighty  parts;  yellow  wax, 
twenty  parts.  Melt  the  wax  and  add  the  petrolatum  gradually,  then 
stir  the  mixture  constantly  until  cool.    A  yellowish-white  ointment. 
