238 
ACTION  OF  CARBONIC  ACID  UPON  QUININE,  ETC- 
which  took  up  3  parts  of  a  yellowish,  fatty  oil  of  a  mild  taste. 
The  portion  insoluble  in  ether  was  a  brown  solid  resin ;  it  had 
a  shining  appearance,  was  hard  and  brittle,  burnt  when 
heated  over  flame,  fused,  and  left  a  small  residue  of  earthy  ashes. 
The  alcoholic  solution  gave  a  grayish-white  flocculent  precipitate 
with  water ;  it  dissolved  in  caustic  alkalies  with  a  fine  red  color, 
and  in  fatty  ethereal  oils.  Concentrated  sulphuric  acid  dissolved 
the  resin,  forming  a  reddish-brown  fluid.  Nitric  acid  gave  a  yel- 
lowish solution.  The  portion  of  the  galls  not  taken  up  by  ether 
was  exhausted  with  alcohol,  the  alcohol  distilled  off,  and  the  res- 
idue treated  with  water,  by  which  5  parts  of  the  resin  above  men- 
tioned were  separated.  The  tannic  acid  and  8  parts  of  gallic 
acid  were  obtained ;  these  were  determined  by  their  behaviour 
with  salts  of  oxide  of  iron. 
Adding  the  constituents  contained  in  the  watery  extracts,  the 
Bassorah  galls  consist  of — 
Tannic  acid   130  parts 
Gallic  acid        .       .       ...       .       .       .  8  " 
Fatty  Oil  .......  3  « 
Resin  .......         17  " 
Extractive  with  salts  .  .       .       .       *         10  " 
Linen-starch  with  small  portions  of  common  starch  )     ^9  u 
and  albumen  3 
Fibrine  .       .       -       .       .       .       .     230  « 
Water  60  « 
500  parts. 
Chem.  Graz.  Dec.  15, 1854,  from  Archiv  der  Pharm.  lxxv. 
ON  THE  ACTION  OF  CARBONIC  ACID  UPON  QUININE  AND  CIN- 
CHONINE  AND  ON  THE  FORMATION  OF  CRYSTALIZED  CAR- 
BONATE OF  QUININE. 
By  M.  Langlois. 
A  stream  of  carbonic  acid  gas  was  passed  through  newly  pre- 
cipitated quinine  and  cinchonine  suspended  in  water.  The  pro- 
longed action  of  the  gas  causes  the  quinine  and  cinchonine  to  dis- 
solve ;  the  former  dissolves  more  readily  than  the  latter.  Both 
solutions,  when  exposed  to  the  air,  lose  a  portion  of  their  car- 
bonic acid,  the  one  furnishing  crystals  of  carbonate  of  quinine, 
