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 OP RUBBER 
EXTRACTED FROM HEYEA BRASILIENSIS. 
By Mr. Stanley Arden. 
(Copy) 
Straits Settlements. 
Native States. 
[ No. 432. ] 
Downing Street, gist December, igo2. 
Sir, — I have the honour to transmit to you for your information 
and for communication to Mr. Stanley ARDEN, Superintendent 
of Experimental Plantations, the papers noted in the subjoined 
schedule. 
I have, etc., 
. (Sd). ONSLOW, 
For Secretary of State. 
The Officer Administering the Government 
of the Straits Settlements. 
Date. From. 
To. 
Subject. 
24th December, The Director 
1902. of the Royal 
Gardens, Kevv. 
The Colonial 
Office, 
Report on cer- 
tain samples of 
Para rubber, 
coagulated by 
various me- 
thods. 
(Copy) 
Royal Botanic 
December 
Gardens, Kevv, 
24th , 1 go 2. 
Sir, — I have the honour to inform you that 1 have received from 
Mr. STANLEY Arden, Superintendent of Experimental 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- 
port is enclosed. 
2. Without entering into unnecessary details it is sufficient to 
notice that Nos. 1 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 were coagulated by 
various mineral acids. 
