278 
The analyses gave the following results : — 
Rubber as received. of dry 
Moisture, per cent 
No. I. 
9.0 
No. 2. 
8.8 
No. 1. 
No. 2. 
Caoutchouc „ „ 
80.2 
82.0 
88.1 
89.9 
Resin „ 
4-7 
4 -7 
5-2 
5.2 
Proteids „ „ 
5-3 
3-4 
5-8 
3.7 
Ash „ „ 
0.8 
1.1 
0.9 
1.9 
The percentages of moisture recorded above are probably much 
lower than the amounts actually presented in the balls, as the paper 
in which the samples were wrapped had evidently absorbed a 
considerable amount of liquid during transit. You will observe that 
the percentage of resin is a little high in both specimens and that the 
amount of proteid in No. I is greater than usual in plantation rubber, 
I shall be interested to learn the results of the sale of this small 
consignment of rubber. 
I am, Yours faithfully, 
(Signed). The Director. 
The India Rubber, Gutta Percha and Telegraph Works 
Co., Ltd. 
London , jo/// [line, 1909. 
E.C. 
H. N. Ridley Esq., 
Director, Botanic Gardens, 
Singapore. 
Sir, — In further reply to your letter of 2lst April, headed 
“Economic” 035/09, and acknowledged on the 20th ult., I have now 
received from our Works an analysis and report on the two samples 
of rubber which you submitted. When I examined the samples 1 
formed an opinion of them which has been borne out by our Works’ 
report. They had an appearance which did not do them justice, 
but even making allowance for this you will see that they are not 
considered equal to Fine Para by 8 to 15 °/ Of the two, No. 2 is 
the weaker and softer, which may be due to the latex being collected 
from younger trees, because it seems strange that while the No. 1 
is undoubtedly overheated in the process of smoking, yet it is 
superior to the No. 2 sample. 
Chemical Test. 
Ash. India Rubber. 
'■%, •' ' ' %, 
0.62 9 3-78 
0.45 91-67 
Loss in 
Resin. 
Organic 
Washing. 
Matter. 
y 
. % 
Sample No. I 
23.6 
3-41 
2.19 
Sample No. 2 
16. 1 
4-65 
3-23 
