356 
BRONZE  POWDER. 
Aloes  Composita,"  for  adoption  in  the  place  of  "Decoctum 
Aloes  Compositum." 
MISTURA  ALOES  COMPOSITA. 
Take  of  Extract  of  Liquorice,    ...        .    j  ounce. 
Liquorice  Root  (in  moderately  fine  powder,)  lj  ounces. 
Carbonate  of  Potassa,    .  .        .1  drachm. 
Aloes,  Myrrh,*  and  Saffron,  (each  in 
moderately  fine  powder,)  each        .  1J  drachms. 
Compound  Tincture  of  Cardamom,         .  6|  fluid  ozs. 
Distilled  Water,  18    «,  « 
Rub  well  together  the  Aloes,  Myrrh  and  Carbonate  of  Po- 
tassa,— add  the  remaining  powder,  and  mix  all  intimately. 
Having  mixed  the  water  and  Compound  Tincture  of  Cardamom, 
pour  of  this  liquid  on  the  compound  powder,  sufficient  to  dampen 
it, — pack  moderately  in  a  suitable  displacer ;  and  having  placed 
over  the  surface  a  piece  of  perforated  filtering  paper,  pour  on 
the  remainder  of  the  liquid,  and  when  it  has  ceased  to  pass,  add 
water  sufficient  to  make  the  filtrate  measure  in  all  twenty-four 
fluid  ounces. 
As  thus  prepared,  the  Compound  Mixture  of  Aloes  is  a  clear, 
rich,  reddish  brown  liquid,  possessing  in  a  marked  degree  the 
characteristic  properties  of  the  compound. — Journ.  and  Trans, 
of  the  Maryland  Coll.  of  P harm.,  June,  1858. 
BRONZE  POWDER. 
Hr.  Konig  has  made  some  experiments,  with  the  view  of  ascer- 
taining the  mode  of  preparing  bronze  powder,  which  is  generally 
kept  secret.  The  specimens  he  examined  were  those  known 
commercially  as — 
1.  Pale  yellow.  2.  Yellow.  3.  Reddish  yellow.  4.  Orange. 
5.  Copper  red.    6.  Violet.    7.  Green.  8.  White. 
The  bronze  powders  1,  2,  3,  4,  6  and  7,  were  found  to  consist 
of  copper  and  zinc,  with  traces  of  iron.  3,  4,  6  and  7  contained 
a  small  amount  of  oxydized  copper,  the  surface  of  the  particles 
being  covered  with  suboxide  of  copper.  This  is  shown  by  the 
action  of  acids ;  for  when  the  powder  was  covered  with  dilute 
*The  finest  pieces  of  Myrrh  in  lump  should  be  selected. 
