''^"™Oct"'iSr™^'}        Comparison  of  Galenical  Prepay^ations.  495 
Mucilago  Acacice,  U.  S.  Mucilago  Gummi  arabici,  P.  G. — Gum 
arabic  washed  with  cold  water  34  parts  U.  S.j  33  parts  F.G.y  dissolve 
in  water  66  parts. 
Oleoresina  Aspidii,  U.  8,  Extractnm  Filicis,  P.  G. — Displace  male 
fern  100  parts  with  stronger  ether  until  150  parts  of  percolate  are 
obtained;  distil  and  evaporate  until  free  from  ether.  U.  8. — Macerate 
for  3  days  male  fern  5  parts  with  ether  15  parts;  decant,  and  again 
macerate  with  ether  10  parts ;  express,  filter  and  evaporate.  The 
extract  stirred  and  diluted  with  glycerin  should  not  show  any  starch 
granules  when  examined  under  the  microscope.  P.  G. 
Oleoresina  Cubebce,  U.  8.  Extractum  Cubebarum,  P.  G. — Displace 
cubeb  100  parts  with  stronger  ether  until  150  parts  are  obtained;  dis- 
til and  evaporate  until  free  from  ether ;  set  aside  and  decant  from  the 
waxy  and  crystalline  matter.  U.  8. — Macerate  for  3  days  cubeb  10 
parts  with  a  mixture  of  ether  (spec.  grav.  726)  and  ah^ohol  each  15 
parts  and  express;  again  macerate  with  alcohol  and  ether  each  10 
parts  and  express;  filter  and  evaporate.  Before  dispensing  shake 
well.  P.  G. 
Pllulce  Aloes  et  Ferri,  U.  8.  Pilulse  aloeticse  ferratse,  P.  G. — Puri- 
fied aloes,  dried  sulphate  of  iron  and  aromatic  powder  of  each  6*50  gm. 
(100  gr.);  confection  of  rose  sufficient;  make  100  pills,  U.  8. — Dried 
sulphate  of  iron  and  aloes,  of  each  equal  parts;  alcohol  sufficient;  make 
pills  each  weighing  O'l  gm.;  by  means  of  tincture  of  aloes  make  them 
glossy  and  black.  P.  G. — The  pills  contain  -065  gm.,  U,  8.,  '050  gm., 
P.  G.,  of  each  aloes  and  exsiccated  ferrous  sulphate. 
Potassa  sulphurata,  U.  8.  Kalium  sulfuratum,  P.  G. — The  pro- 
cesses of  the  two  pharmacopoeias  are  practically  identical.  The  potas- 
sium carbonate  used  contains  at  least  81  per  cent.  U.  8.,  89*7  per.  cent. 
P.  G.,  of  pure  potassium  carbonate ;  two  parts  of  it  mixed  with  1  part 
of  sulphur  are  fused  in  a  crucible  U.  8.,  in  an  iron  or  earthen  vessel 
P.  G.,  and  the  melted^mass  poured  on  a  marble  slab  U.  8.,  into  an 
iron  mortar  or  an  iron  slab.  P.  G. 
Pulvis  effervescens  compositus,  U.  8.  Pulvis  aerophorus  laxans,  P. 
G. — Each  powder  in  blue  paper  contains  2.583  gm.,  Z7.  8.,  2.5  gm.,  P. 
G.,  of  sodium  bicarbonate  and  7'75  gm.  U.  8.,  7*5  gm.  P.  G.,  of 
Rochelle  salt.  The  white  powders  contain  2*25  gm.  U.  8.,  2*0  gm. 
P.  G.  of  tartaric  acid. 
Pulvis  Glycyrrhizce  compositus,  U.  8.  Pulvis  liquiritse  compositus, 
P.  G. — Senna  18,  glycyrrhiza  16,  fennel  8,  washed  sulphur  8,  sugar 
