140 
Saga the character of the tree and the mode of extracting the resin. 
tree is known locally as ‘Ton Rong? It is found only in the 
islands of Koh Chang, Koh Kong, and Koh Rong, and the mainland of 
Indo-Chinese Peninsula a these islands. The trees grow to 
the height of some 50 feet, are straight-stemmed with no lower 
branches, ara probably to the dense shade of the forest in which they 
of those I saw had a diameter of more than 12 inches. 
en years’ growth is said to be reauired before the tree is ready for 
This is carried on by the Cambodian and Siamese islanders in 
downwards to the ground. Down these grooves the resin wells out of 
the bark and trickles in a viscous stream into hollow bamboos placed at 
the base of the tree, and from these it is decanted into smaller bamboos, 
the bamboo is placed over a red-hot ore, and the bamboo husk. cracking 
off, there is left the article known as ‘ pipe’ gamboge. The trees can be 
ta two or three times during one season, and at the end of the 
season their trunks. present a curious netwo rk of interseeting spirals. 
Care must be taken to prevent the rain-water mixing with the resin in 
the es, as any mixture of water causes kanay ombi and black 
discolouration, and a consequent depreciation of from 20 to 30 ticals 
SE honey in value. The most valuable gamboge is that which is 
bed or discoloured, and is all the more difficult to 
prre reinen the period of heavy rains during which the resin is 
extracted. The bamboos contain on an a ied rather less than 1 Ib. of 
gamboge, or about 170 bamboos to the pieul. The price asked by the 
pickers reris es is at the rate of 2 ticals (3s.) for five bamboos full, 
and the price is at the rate of 2 ticals yes. for three, or 65 ticals 
(44. 185.) vm hundred, or about 87. 7s. per picul. The whole output is 
sold to local Chinese traders and tal by sailing boat to Bangkok,” 
CCCCLXIII.—IPOH POISON. 
(Supplementary Note.) 
The Kew Bulletin for 1891 (pp. 259-268) contains an article s 
marising the information which had been obtained as to the Ipoh Bison 
of the Malay Peninsula. 
I munication from Mr. L. Wray jun, Curator, Perak 
Government Mm m, it was stated that while the Sakais living in the 
plains employ the Antiaris poison, the Sakais of tie hills use a siens 
prepared from three hill plants called ipoh aker, prual, and lam 
Further material has now been received from Mr. Wray which ee 
additional light on the identity of two of these plants. Dr. Stapf has 
ingly, in the following notes, been able to revise his 
ns: 
_ Ipoh Aker was stated (l.c. p. 267) to be “ closely allied to Strychnos 
Maingayi, and probably only a different state of it." The copious 
material which I have now hefore me of Strychnos Muingayi as well as 
of the Ipoh Aker oc renders it evident that the latter is not 
 Maingayi,. rsen probably a close congener. It differs from Ss. 
i in the — papery leaves which. are very like those of 
