28 
EXTRACT from LETTER from Sır Свси, C. Suita to Rovar 
GARDENS, Kew. 
Dear SIR, Singapore, August 25, 1881. 
* * * * Lam sending you a small bottle containing some 
of the poison * Ipoh," which the Malays use on their darts and spears. 
There are also some of the leaves, but I am sorry to say по flowers or 
fruit. We have gotit through Mr. Low, who T to obtain the 
specimens while travelling in the — Ў, 
а с - 
W. T. Thiselton Dyer, Esq. (Signed). is Сес, C. SMITH. 
Prof. Sipney RINGER to Royan GARDENS, Kew. 
15, Cavendish Place, Cavendish Square, W., 
My pear Sm, November 24, 1881. 
ND you a report of the experiments made by Mr. Stonham 
and myself with poh. As you will see it is quite inoperative though 
we administered it in large doses. 
Yours, &c. 
(Signed) Бірме RINGER. 
ResuLrTs of Experiments with * Ipoh.” 
1. Nov. 5, 1881. 
Healthy frog: 1 c.c. of 5 °/, sol. injected under skin. 
No effect. 
2. Nov. 7, 1881. 
Same frog as on Nov. 5th. 
m x. of 20 °/_ sol. 
No effect. 
Between eiperiménts 1 and 2 this frog was kept under a bell jar on 
a table, and this in all probability accounts for the lethargy noticed. 
3. Nov. 5th, 1881 
Healthy tr 2.44 га i c.c. of 5 “/ sol. 
2.53 ec. of Б. ° sol. 
3.8 piis i 6.6. of 5 7. ° sol. 
3.10 pm., 1 c.c. of 5 ^/, sol. 
3.20 p.m., 1 c.c. of 5 ^/, sol. 
3.55 p.m., $ c.c. of 5 °/ sol. 
No effect. 
On Nov. 7th this frog was quite well, but a little lethargic. 
4. Nov. erem 1881 
thy frog : 1 c.c. of 20 °/, solution. 
No effect. 
б. Nov. ӨШ, 1881. 
Kitten, six weeks old. 
т x. of 20 °/, solution. 
No effect. 
