A M£r.Xi8nM'}  Gleanings  from  the  European  Journals.  Ill 
bonic  acid  gas  through  the  filtrate  for  a  few  minutes;  the  result  being 
a  beautifully  clear  solution,  the  canary  yellow  color  having  disappeared, 
but  in  odor  and  taste  the  water  remained  unchanged. 
The  product  of  this  last  experiment  has  been  standing  on  the  shelf 
for  a  long  time,  unaltered. 
GLEANINGS  FROM  THE  EUROPEAN  JOURNALS. 
By  the  Editor. 
Ferrated  Cod  Liver  Oil*  was  prepared  by  Julius  Muller  by  dissolv- 
ing one  part  of  sublimed  ferric  chloride  in  one  hundred  parts  of  cod 
liver  oil,  which  thereby  acquired  a  deep  violet,  almost  black,  color,  and. 
rapidly  became  rancid,  while  the  iron  compound  was  reduced  to  fer- 
rous salt. 
A  handsome  ferrated  oil,  however,  is  obtained  by  triturating  one 
part  of  benzoate  of  iron  with  light  cod  liver  oil  until  one  hundred  parts 
of  the  latter  have  been  added,  agitating  the  mixture  occasionally  dur- 
ing several  days,  and  filtering.  The  clear  filtrate  is  of  a  yellowish 
brown  color,  and  contains  nearly  one  per  cent,  of  ferric  benzoate.. 
This  salt  must  be  prepared  for  the  above  purpose  from  benzoic  acid 
obtained  from  benzoin;  the  commercial  salt  usually  has  a  urinous 
odor,  and  imparts  to  cod  liver  oil  a  disagreeable  odor  and  taste. — Ar- 
chiv  d,  Pliar.,  Dec.  1873,  p.  534. 
Impurities  in  Medical  Qhemieals. — Dr.  R.  Goddefroy  in  Zeitschr. 
d.  Oesterr.  Apotb.  Ver  1874,  p.  15,  gives  a  list  of  chemicals  which 
are  usually  found  in  Austrian  commerce  in  an  impure  condition.  Ox- 
ide of  mercury  contains  carbonate  of  calcium  ;  hydrate  of  aluminum 
contains  basic  sulphate  of  aluminum,  and  tartar  emetic,  golden  sul- 
phur, precipitated  sulphur,  phosphate  of  sodium,  sulphate  of  copper, 
ammonia  water,  iodide  of  potassium,  corrosive  sublimate,  caustic  po- 
tassa,  etc  ,  are  often  not  sufficiently  pure. 
Remedy  for  Frostbites. — Berthold  recommended  about  twenty  years 
agof  tannin  for  this  purpose.  Rhien  recommends  the  addition  of 
iodine  as  follows  :  30  grams  of  tannin  are  dissolved  in  200  cc.  of  wa- 
ter, and  3  grams  of  iodine  in  50  grams  of  alcohol ;  the  solutions  are 
mixed  and  the  mixture  diluted  to  1J  litre.    The  mixture  is  placedi 
*See  also  American  Journal  of  Pharmacy,  1861,  p.  317. 
t  See  American  Journal  of  Pharmacy,  1856.  p.  180. 
