98 
Tincture  of  Catechu. 
J  Am.  Jour.  Pharm. 
(      Mar.,  1877. 
and  attention-calling  mark,  but  which  can  be  removed  when  said  bottles 
have  to  serve  for  other  purposes. 
Mr.  Bakes'  suggestion  of  sand-bordered  labels  is  a  step  in  the  right 
direction,  but  we  want  something  more  durable  than  pasted  paper. 
TINCTURE  OF  CATECHU. 
By  Louis  Genois. 
Some  difficulty  being  experienced  almost  daily  by  pharmacists  in 
preparing  the  above  tincture  so  that  it  will  not  gelatinize,  the  appended 
modification  of  the  official  formula  is  hereby  offered  : 
Take  of  Catechu  free  from  dirt,  etc.,  and  in  small  pieces,     3  troyounces  j 
Cinnamon,  in  moderately  coarse  powder,  .  2  troyounces  5 
Water, 
Alcohol,  of  each,  .  .  sufficient  quantity. 
Digest  the  catechu  in  1  pint  of  water  at  a  temperature  of  about  100° 
F.,  until  reduced  to  a  thin  cream-like  consistence  ;  let  cool,  add  a 
pint  of  alcohol,  let  stand  for  twelve  hours,  filter  ;  then,  with  the 
filtrate,  percolate  the  cinnamon,  previously  mixed  with  an  equal  bulk 
of  clean  sand,  and  moderately  packed  in  a  conical  glass  percolator,  and 
when  the  menstruum  has  just  disappeared  from  the  surface,  pour  on 
sufficient  diluted  alcohol  to  make  the  product  measure  two  pints.  Pre- 
pared in  this  way,  tincture  of  catechu  is  very  clear,  of  a  rich  dark 
color,  and  will  not  deposit  insoluble  matter  nor  gelatinize  inside  of  a 
year  at  least. 
Nenv  Orleans,  January  18th,  1877. 
GLYCERITE  OF  NITRATE  OF  BISMUTH. 
By  W.  W.  Moorhead. 
[Read  at  the  Meeting  of  the  Alumni  Association,  Feb.  1,  1877.) 
Glycerol  of  nitrate  of  bismuth,  which  was  the  subject  of  an  article 
in  the  January  number  of  the  "  American  Journal  of  Pharmacy," 
written  by  B.  Squire,  M.  B.,  struck  me  as  something  which  druggists, 
as  well  as  physicians,  have  long  wanted,  and  which  is  destined  to 
become  one  of  our  most  valuable  and  prominent  preparations.  I  pre- 
pared a  portion  of  the  glycerite,  using  two  troyounces  of  nitrate  of 
bismuth,  and  a  sufficient  quantity  of  glycerin  to  make  eight  fluidounces. 
