2o8  Marrubiin  and  its  Die hlorine  Derivative.  {AmAP0rUii;iP897arm' 
which  is  practically  the  same  as  that  previously  obtained;  -1654 
gramme  of  the  substance  yielded  : 
•4372  gramme  of  C02  =  72*07  per  cent,  of  C. 
•1305      "       *  H26=     877  "      "      "  H. 
19-16  V      "      "  0. 
IOO'OO 
\ 
The  average  of  the  three  combustions  was  : 
Calculated  for 
Found.  (CgoH^Oe). 
Per  Cent.  Per  Cent. 
C                                                                   72*28  72*14 
H  .  o                                                               8  68  8  62 
O                                                                 19*04  19*24 
100 -oo 
My  results  confirm  Kromayer's,  in  general,  excepting  the  melting 
point,  which  he  determined  to  be  1600  C.  They  also  differ  from 
the  melting  point  stated  by  Harms  to  be  1480  C. 
The  melting  point  obtained  by  myself  is  nearest  to  the  one  ob- 
tained by  Morrison. 
My  results  show  that  marrubiin  is  not  a  glucoside  ;  so  they  also 
differ  in  that  respect,  as  well  as  in  the  matter  of  its  formula  from  the 
results  obtained  by  Morrison. 
Dichlorine  Derivative  of  Marrubiin. — A  small  quantity  of  marru- 
biin was  dissolved  in  ether  and  dry  chlorine  gas  passed  into  the 
ethereal  solution,  until  no  more  of  the  gas  was  absorbed. 
The  ethereal  solution,  which  was  of  a  yellow  color,  was  divided 
into  two  portions,  one  portion  being  allowed  to  evaporate  and  the 
other  poured  into  an  excess  of  water.  The  portion  poured  into  the 
water  was  stirred,  the  water  poured  off  and  the  precipitated  sub- 
stance washed  with  successive  portions  of  water  and  carefully  dried. 
When  dry,  it  was  found  in  the  form  of  a  yellowish- white,  hard,  wax- 
like mass,  adhering  to  the  sides  of  the  beaker.  The  portion  of  the 
ethereal  solution  which  was  allowed  to  evaporate  left  a  thick,  oily, 
yellowish-brown  substance,  which,  when  redissolved  in  ether  and 
allowed  to  evaporate  several  times  and  then  washed  repeatedly  with 
water,  assumed  a  form  similar  to  the  substance  obtained  by  pouring 
a  portion  of  the  ethereal  solution  into  water. 
A  preliminary  test  for  chlorine  was  made  by  heating  a  small  por- 
