30 
tallies with the information given me by the aborigines that it was not 
itself poisonous, but was the vehicle for the other things mixed with 
it, among which is the sap of “ Ipoh Akar,” to form the blow-pipe arrow 
poison, respecting the preparation of which I атое details when 
last in England to Dr. Rost, of the India ues 
Ihave 
, (Signed) D F. A. 
The Hon. the Colonial Secretary, Resident ‘Couneillor. 
Straits Settlements, Singapore, 
Dr. Sipney RiseER, F,R.S., to ROYAL GARDENS, Kew. 
15, Cavendish Place, W., 
DEAR T THISELTON DYER, December 10, 1890. 
M very sorry 80 long a time has elapsed before sendin ng you 
the = n The work was completed very shortly after you sent the 
material, but ац І have often asked for the report I have not been 
able to get it from Mr. Bradford who made the experiments. I, how- 
ver, saw them all, and so can report myse 
‚ Gerrard, our dispenser at our hospital, a very able man, carefully 
examined the specimens* and could not obtain any body, either an 
alkaloid or glucoside, and came to the conclusion the substance must be 
inert. Mr. Bradford’s experiments quite at this conclusion. 
Large doses were used without any effect ; once we thought the heart 
the substances may be nein inert, 
8, &c. 
(Signed)... 5, RINGER., 
RoYAL GARDENS, KEW, tò COLONIAL SECRETARY, SINGAPORE, 
Royal Gardens, тне. 
ecember 15, 5, 1890. 
I mave the honour to acknowledge the receipt of: the Acting 
Colonial Seeretary's letter of September 17, 1889 [Mal. -gg ] enclosing 
a copy of a ietter from the Resident Councillor of Malacca, regarding 
specimens of Ipoh poison forwarded to me by the same mail. 
2. These imens were р at Kew. I was fortunate in 
бйр “Dr. Sidney Rin Ringer, F.R.S., Professor of~Clinical Medicine, 
University College, London, to tindertake their examination. He had 
been good — to report previously on a sample of the same poison 
obtained by Sir Hugh Low, British Resident at the time in Perak, and 
ce it a to Kew in 1881 by the present Governor of the Straits 
Sir. 
Ws T1 od recently, reminded Professor Ringer that I had n 
received any report for transmission to you of ue results of the mod 
nation he had so Eine undertaken. He has e ape to 
‚ышы 
ва * 1 Ringer informs me that Tak ipli wii yen both proved 
* 
