^'^Ap'Jslo.'"'}         Xanthoxylum  Carolinianum,  191 
wash  the  precipitate  on  muslin  until  the  washings  are  tasteless,  and, 
after  thoroughly  squeezing  it,  mix  it  with  the  following  ingredients, 
viz.: 
01.  morrhuae,  ....  f^iii 
P.  g.  acacias,        .....  3vi 
P.  sacchari  albi,  .... 
01.  sassafras,        .  .  .  .  .  gttxv 
01.  gaultherias,  ....  gttvi 
01.  cinnamomi,    .....  gttiv 
Aquae,  q.  s.  ft.,  ....  ^.S^iii 
Rub  the  phosphate  of  calcium  with  the  sugar  and  gum  in  a  mortar, 
and  water  sufficient  to  reduce  it  to  the  consistence  of  cream,  add  this 
to  the  oil  previously  put  in  a  bottle  and  shake  well  for  a  few  minutes. 
The  rest  of  the  water  may  then  be  poured  in  a  little  at  a  time.  The 
•essential  oils  can  be  mixed  with  the  codliver  oil. 
Mow  to  Preserve  Tragacanth  Paste. — To  half  a  pint  of  tragacanth 
paste  are  added  25  drops  of  oil  of  sassafras.  This  will  be  found  to 
preserve  it  without  spoiling  for  three  months,  even  in  warm  weather. 
A  quick  way  to  make  Paregoric. — If,  instead  of  powdered  opium,  a 
•quantity  of  tincture  of  opium  containing  an  equivalent  proportion  is  used, 
paregoric  can  be  made  in  ten  minutes  equal  in  every  respect  to  the  offici- 
nal, provided  the  laudanum  used  is  of  proper  strength,  thus: 
R    Tinct.  opii,  .  .  .  f3iss  and  48  minims 
(which  contains  the  medicinal  virtues  of  i  drachm  of  p.  opium) 
Acid,  benzoic,  .  .  .        sixty  grains 
Camphorae,  ....  forty  grains 
01.  anisi,  ....  one  fluidrachm 
Mel.  desp.,  .  .  .       two  troyounces 
Alcohol,  dilut.,  .       thirty  and  one-half  fluidounces 
Mix  and  filter. 
XANTHOXYLUM  CAROLINIANUM. 
By  George  Havens  Colton,  Ph.  G. 
[From  an  Inaugural  Essay.) 
A  quantity  of  the  bark  was  carefully  examined  to  insure  its  identity 
and  freedom  from  admixture  with  other  barks.  A  portion  of  the  bark 
was  exhausted  with  alcohol  and  the  tincture  evaporated  to  the  con- 
sistence of  a  soft  extract.  This  was  treated  with  petroleum  benzin 
until  a  portion  of  the  benzin  left  no  residue  on  evaporation.  Upon 
evaporating,  a  residue  was  obtained,  consisting  of  a  greenish  colored 
:fixed  oil,  of  an  intensely  acrid  taste,  soluble  in  alcohol,  ether  and  chloro- 
form, and  mixed  with  a  crystalline  substance. 
