Am'  fer-x876!rm-}         Pharmacy  of  Salicylic  Acid.  67 
30  grams  of  glycerin  are  added,  and  the  mixture  is  heated,  with  con- 
stant agitation,  until  it  has  acquired  the  proper  consistence,  when  10 
grams  of  purified  tar  are  added  and  well  mixed. — D  Union  Pharm., 
l$75,  p.  324- 
Cauterizing  Pencils  of  Sulphate  of  Copper. — Schoull  reduces  the  crys- 
tals of  copper  sulphate  to  a  coarse  powder,  which  is  heated  in  a  porce- 
lain capsule  to  about  1500  C.  (3020  F.).  When  it  has  lost  nearly  all 
its  water  of  crystallization,  the  heat  is  discontinued  and  the  mass 
allowed  to  cool  somewhat ;  it  is  powdered  finely  and  the  water  again 
added  in  small  quantities,  and  well  incorporated  with  the  aid  of  a  pestle. 
On  combining  again  with  its  water  of  crystallization,  the  salt  becomes 
hot,  and  finally  acquires  a  pilular  consistence,  when  it  is  rolled  out  into 
cylinders  of  suitable  thickness,  which  gradually  become  quite  hard. 
Should  the  water  have  been  added  somewhat  in  excess,  the  addition  of 
a  little  finely  powdered  effloresced  copper  sulphate  will  impart  the 
necessary  consistence. — Ibid.,  p.  326.  (See,  also,  Amer.  four.  Phar., 
I^7S->  P-  267  and  504.) 
Collodion  for  Freckles  [Collodion  antephtlique). — In  place  of  mercuric 
chloride  and  cyanide,  which  are  usually  recommended  for  the  removal 
of  freckles,  the  "  Phar.  Zeitschr.  f.  Russl."  recommends  the  following 
preparation,  as  being  effectual  without  possessing  the  dangers  of  the 
former :  One  gram  of  sulphocarbolate  of  zinc  is  reduced  to  a  very 
fine  powder,  and  then  incorporated  by  trituration  with  one  gram  of 
essence  of  lemon  (or  other  flavor) ;  5  grams  alcohol  and  45  grams  of 
collodion. — Ibid. 
THE  PHARMACY  OF  SALICYLIC  ACID. 
BY  M.  MAURY. 
The  author,  who  is  a  pharmacien  residing  at  Lyons,  has  made  a 
compilation  of  different  formulae  for  the  administration  of  salicylic 
acid,  which  he  read  before  the  Pharmaceutical  Association  of  that  city 
at  its  October  meeting.  The  paper  is  published  in  the  "  Repertoire  de 
Pharmacie"  (Oct.  25,  p.  609),  and  we  are  indebted  to  it  for  the  fol- 
lowing extracts  : 
External  use. — Dr.  Wagner  recommends  that  a  thin  layer  of  finely 
powdered  salicylic  acid  should  be  spread  upon  calico  and  applied  by 
means  of  a  bandage  to  wounds. 
