Amj2£iS^m"}    Recent  Literature  Relating  to  Pliarmacy.  309 
RECENT  LITERATURE  RELATING  TO  PHARMACY. 
THE  SACCHARINE  AND  A5TRIGENT  EXUDATIONS  OF  THE    ''GREY  GUM 
EUCALYPTUS  PUNCTATA. 
Henry  G.  Smith  [Proc.  Royal  Soc.  of  N.  S.  Wales,  31,  177;  has 
found  several  substances  exuding  from  the  bark  of  the  Grey  Gum. 
This  exudation  was  caused  by  the  puncture  of  an  insect,  and  the 
character  of  the  oroduct  depends  upon  the  following  : 
(a  When  the  puncture  has  not  penetrated  entirely  through  the  bark  and  a 
flow  is  set  up,  the  exudation  is  quite  white  and  consists  largely  of  rafiinose 
(melitose). 
{6)  When  the  puncture  has  just  penetrated  through  the  bark,  the  product  is 
contaminated  with  tannic  acid  and  eudesmin,  showing  that  eudesmin  15  present 
in  the  cells  :■:  the  tree  with  tannic  acid. 
{c)  When  the  puncture  or  boring  of  the  larva  has  continued  into  the  wood  of 
the  tree,  pure  kino  is  produced,  providing  the  sugary  sap  of  the  bark  is  not 
exuding  at  the  same  time. 
This  indicates  that  the  kino  is  not  obtained  from  the  bark  directly, 
but  from  the  wood  of  the  tree.  The  bark  does  not  contain  tannin, 
but  consists  principally  of  the  sugar  raffinose.  The  saccharine  exu- 
dation was  examined  by  Mr.  Smith,  and  determined  to  be  practi- 
cally identical  in  composition  with  the  ordinary  and  well-known 
Eucalyptus  manna,  It  was  found  to  consist  very  largely  of  raffinose 
and  a  small  quantity  of  reducing  sugars, 
The  darker  saccharine  exudation  obtained  when  the  puncture  just 
penetrated  through  the  bark  contained  raffinose,  tannin  and  anhy- 
drides, eudesmin.  eucalyn  and  an  easily  fermentable  reducing  sugar, 
The  astringent  exudation  obtained  when  the  puncture  penetrated 
the  wood  was  found  to  belong  to  the  turbid  groups  "  of  Euca- 
lyptus kino.  The  crystalline  substance  contained  in  it  was  deter- 
mined by  the  method  previously  adopted  for  the  extraction  of  these 
new  bodies,  eudesmin  and  aromadendrin,  from  Eucalyptus  kino  See 
Proc.  Royal  Soc.  N.  S.  Wales,  1895,  page  52.  and  Am.  Jour.  Phar., 
1895,  Page  575  •  The  product  obtained  in  the  present  case  was  eu- 
desmin. Aromadendrin  could  not  be  detected  in  this  kino,  so 
so  that  now  it  is  possible  to  divide  the  11  turbid  group  "  of  kinos  into 
three  sub-groups,  based  on  a  chemical  classification,  viz..  (a)  those 
that  contain  aromadendrin  alone,  of  which  E.  calophylla  is  a  repre- 
sentative: (b)  those  that  contain  eudesmin  alone,  of  which  E.  punc- 
