70 
cription  or  figure  to  fit  it.  These  insects  are  likely  to  prove  very 
destructive,  and  the  caterpillars  should  be  killed  on  sight. 
H.  N.  RIDLEY. 
REPORT  ON  SAMPLES  OF  RUBBER 
EXTRACTED  FROM  HEVEA  BRASILIENSIS. 
By  Mr.  St.anlev  Arden. 
(Copy) 
Straits  Settlements. 
Native  States. 
[ No.  432.  ] 
IJ 07V /ling  St/'eet,  gist  Dccembe/',  kjo2. 
Sir, — 1 have  the  honour  to  transmit  to  you  for  your  information 
and  for  communication  to  Mr.  St.ANLEY  Arden,  Superintendent 
of  Experimental  Plantations,  the  j^apers  noted  in  the  subjoined 
schedule. 
1 have,  etc., 
(Sd).  ONSLOW, 
For  Secretary  of  State. 
The  Officer  Administer ingr  the  Government 
of  the  Straits  Settlements. 
Date.  LToni.  To.  I Subject. 
24th  December,  'Lhe  Director  'Lhe  Colonial  Report  on  cer- 
1902.  of  the  Royal  Office.  tain  samples  of 
(lardens,  Kew.  Para  rubber, 
coagulated  by 
various  me- 
thods. 
(Copy)  Royal  Botanic  (Lvkdens,  Kew, 
December  24th,  i(j02. 
Sir, — 1 have  the  honour  to  inform  you  that  1 have  received  from 
Mr.  Stanli<:y  Arde.n,  Superintendent  of  L.xperimental  Plantations 
in  the  Federated  Malay  .States,  a series  of  samples  of  Para  rubber 
coagulated  by  various  methods,  with  a request  that  I would  obtain 
a commerical  report  upon  the  results.  A copy  of  the  brokers’  re- 
j)ort  is  enclosed.  , 
2.  Without  entering  into  unnecessary  details  it  is  sufficient  to  i 
notice  that  Nos.  i and  6 were  naturally  coagulated;  No.  2 was^ 
coagulated  by  the  addition  of  acetic  acid;  No.  7 was  “scrap  rubber”! 
collected  off  the  tree;  the  remaining  samples  weie  coagulated  byJ 
various  mineral  acids.  ^ I 
