AmMay?i9ooarm'}    Recent  Literature  Relating  to  Pharmacy,  231 
DETERMINATION  OF  VANILLIN  IN  VANILLA. 
Mr.  Busse  removed  and  estimated  the  vanillin  by  the  usual 
method  :  extraction  with  ether,  removal  from  the  ethereal  extractive 
by  means  of  sodium  bisulphite,  etc. 
Tiemann  and  Haarmann  found  : 
Per  Cent, 
of  Vanillin. 
Best  Mexican  bean  to  contain  from   1 '69  to  1 '86 
Bourbon  variety  contained  from  1 '91  to  2*90 
Java  bean  contained  275 
The  author  found : 
German  K.  African  vanilla  to  contain  2*16 
Ceylon  "      "       "        .  1-48 
Tahiti  "      "       "   1*55  to  2*02 
There  does  not  appear  to  be  any  relation  between  the  amount 
of  vanillin  present  in  a  bean  and  its  value  as  a  flavoring  agent,  since 
the  most  aromatic  and  best  flavored  vanilla  frequently  contains  less 
vanillin  than  a  vanilla  of  inferior  quality.  The  aroma  and  flavor 
are,  therefore,  not  entirely  due  to  vanillin. — Arb.  Kaiserl.  Ges.  (1898), 
75,  1 ;  through  J.  Soc.  Chem.  Ind.t  18,  952.  L.  F.  K. 
THE  ANALYSIS  OF  LUPULIN. 
Hager's  "  Kommentar,"  second  edition  states  that  lupulin  should 
not  contain  more  than  10  per  cent,  of  ash  and  yield  at  least  70 
per  cent,  of  ether  extractive.  The  U.S.P.  prescribes  a  limit  of  10 
per  cent,  of  ash,  but  the  B.P.  allows  15  per  cent. 
Mr.  R.  W.  Moore  prefers  drying  and  weighing  the  residue  to 
drying  the  extractive  and  weighing  it ;  because  the  latter  procedure 
always  occasions  loss,  by  volatilization  of  the  more  fugitive  bodies. 
The  analytical  results  of  twenty-five  samples  are  given  ;  of  these 
only  two  contained  less  than  10  per  cent,  of  ash  and  twelve  con- 
tained more  than  70  per  cent,  of  extractive.  There  does  not  ap- 
pear to  be  any  ratio  between  ash  content  and  ethereal  extractive. 
The  old  and  inferior  lupulin  contained  less  ash  than  the  article  ot 
superior  quality.  This  is  due  to  the  fact  that  new  lupulin  is  very 
sticky,  causing  the  adhesion  of  much  more  foreign  matter  than 
the  old.  From  these  analyses  it  would  appear  that  15  per  cent,  of 
ash  would  be  more  nearly  correct  than  10  per  cent*,  as  is  now 
required. — J.  Chem.  Soc.  hid.  (1899),  18,  987.  L.  F.  K. 
