ATanuarryPih8t7m'}       Murray  Red  Gum  and  Its  Kino.  5 
Since  the  above  observations  were  made,  H.  G.  Smith  and  the 
writer1  have  been  re-examining  Eucalyptus  kinos.  These  researches 
have  been  continued  by  Mr.  H.  G.  Smith.2  From  these  papers  it  will 
be  seen  that  certain  kinos  of  the  "  Turbid "  group  contain  new 
organic  bodies,  Eudesmin  or  Aromadendrin,  or  a  mixture  of  both. 
All  the  kinos  of  this  group  (of  which  E.  rostrata  is  a  member)  are 
at  the  present  time  being  examined  with  the  view  to  ascertain 
whether  they  contain  these  new  substances,  and  in  what  quantities. 
In  the  first  broad  grouping  of  these  kinos,  Catechin  was  (from  im- 
perfect investigation)  stated  to  be  present. 
Why  Eucalyptus  Rostrata  Kino  is  Usually  Chosen  for  Medicinal 
Purposes. — Because  this  species  is  very  gregarious,  it  cannot,  in  the 
districts  in  which  it  occurs,  be  mistaken  for  any  other  species,  and 
because  it  is  a  comparatively  free  yielder  of  kino.  All  these  are 
important  practical  considerations,  apart  from  the  properties  of  E. 
rostrata  kino  itself.  The  discrimination  of  the  various  species  of 
Eucalyptus  in  a  forest  is  so  difficult  that  considerable  botanical 
knowledge  would  be  required  in  the  case  of  a  kino  collector  who 
might  be  set  to  the  task  of  collecting  kinos  true  to  name.  As  a 
matter  of  fact,  such  men  are  not  available  for  the  work  of  kino 
collecting  in  a  mixed  Eucalyptus  forest. 
Eucalyptus  Rostrata  and  Its  Oil. — In  passing,  the  following  notes 
may  be  useful : 
The  leaves  of  the  red  gum  emit  a  pleasant  odor  when  crushed  in 
the  hand,  but  the  Eucalyptus  oil  they  contain  is  not  a  regular  article 
of  commerce,  as  it  is  not  yielded  in  payable  quantity.  Mr.  Bosisto 
thus  reports  on  it  in  the  Trans.  Roy.  Soc.  of  Victoria,  Vol.  VI,  1 861-4: 
"  Plants  grown  on  high  ground  give  an  oil  of  a  dark  amber  color, 
possessing  an  agreeable  aromatic  flavor,  and  having  the  odor  of 
caraways.  The  yield  from  100  pounds  of  the  fresh-gathered  leaves 
was  1  ounce  6  drachms.  The  plants  grown  on  low  marshy  soil 
yielded  an  oil  of  a  pale-yellow  color,  in  appearance  and  smell  simi- 
lar to  that  yielded  by  E.  odorata,  the  quantity  being  9^  drachms 
to  100  pounds."    Last  year  M.  Mellon,  of  the  Dunolly  Scent  Farm, 
1  A  Contribution  to  the  Chemistry  of  Australian  Myrtaceous  Kinos.  Proc. 
Royal  Society  N.  S.  IV.,  29,  30  (1895). 
2  On  Aromadendrin  or  Aromadendric  Acid  from  the  Turbid  Group  of  Euca- 
lyptus Kinos.    Proc.  Royal  Soc.  N.  S.  IV.,  30,  135  (1896). 
