132  Gleanings  from  the  German  Journals.  { ^iJJSE w§Tm' 
Analysis  of  the  fruit  of  Gleditschia  triacanthos. — Heckel  and 
Schlagdenhauffen  obtained  the  following  constituents  as  a  result  of 
their  investigations  : 
Petroleum  ether  extracted  wax,   0*625 
Alcohol  extracted  glucose  and  saccharose,   37'65° 
Water  extracted  \  -um'  Pectin  and  tanuin' 23'993 
C  salts,   8*409 
Incineration  of  residue  gave  salts,    0-596 
Difference,    { albuminous  matter,    8-300 
'     I  lignin  and  cellulose,   20-427 
IOO'OOO 
They  have  confirmed  the  observations  of  former  investigators  of 
the  absence  of  alkaloid  in  the  alcoholic  extract. — Rep.  dc  Pharm  , 
Jan.,  1893,  P.  1. 
GLEANINGS  FROM  THE  GERMAN  JOURNALS. 
By  Frank  X.  Moerk,  Ph.G. 
Behavior  of  red  coloring  matters. — If  a  colored  solution  is  to  be 
examined  for  the  identification  of  the  coloring  matter,  the  following 
test  (first  devised  to  detect  aniline  red  in  carmine')  will  prove  ser- 
viceable: The  solution  is  mixed  with  one  volume  chloroform  and 
three  volumes  absolute  alcohol  and  thoroughly  agitated ;  two  vol- 
umes of  water  are  then  added  (without  agitating  the  mixture),  which 
causes  the  carmine  to  separate  almost  completely  between  the  two 
layers  of  the  liquids  ;  aniline  red  in  this  test  is  found  entirely  in  the 
chloroform  layer.  An  examination  of  a  number  of  vegetable  red 
coloring  principles  according  to  this  test  resulted  as  follows :  Elder- 
berry, most  of  the  color -remains  dissolved,  the  upper  layer  having  a 
rose-red,  the  lower  layer  a  pale  yellow,  color  ;  the  addition  of  am- 
monia gives  a  green  color  with  both  layers.  Logzvo&d,  a  violet 
separation,  upper  layer  colored ;  ammonia  colors  the  upper  layer 
red,  the  lower  layer  violet.  Red  rose,  the  coloring  principle  is 
yellowish-red,  but  separates  completely  with  blue-violet  color. 
Rhatany -extract,  slight  separation  of  brown  color.  Currants,  the 
color  separates  almost  completely  of  a  rose-red  cslor.  Cochineal, 
violet  ring,  the  coloring  matter  only  separating  partially.  Red  wine, 
rose-red  ring,  after  adding  ammonia  the  upper  layer  becomes  dirty- 
yellow  in  color.  Raspberry,  rose-red  ring  after  adding  ammonia, 
Madder,  red   separation,  chloroform-layer  yellow.    Alkanet,  the 
