76 WOLFRAM FROM BATANG PADANG. 
ANALYSIS OF SAMPLES OF WOLFRAM FROM PERAK, 
STRAITS SETTLEMENTS. 
The samples were contained in two bags, each bag weighing about 
40 lbs. There was no distinguishing mark on the bags. The contents 
of each bag were treated as one sample, and are referred to as sample 
No..'1,-sample. No..2. 
For the purpose of analysis an average sample was prepared from 
each of the two lots. 
A few qualitative tests indicated that the mineral consisted chiefly 
of tungstate of iron and manganese, and that it was therefore wolfram 
or wolframite. 
The quantitative analyses were made in duplicate, two different 
methods being employed for the estimation of the constituents in each 
of the two lots. 
The results obtained by the two methods agreed closely, giving 
as the average composition of the mineral the following numbers :— 
SaMPLE No, 1. SaMPLE No. 2, 
Tungsten Trioxide, WO ... %3°36 % =(58'17) 73°73 % = (58°47) 
3 (Tungsten) (Tungsten) 
Ferrous Oxide, Fe O ... 12°26 % .. 11.84% 
Manganous Oxide, Mn O 12°54 % 43 L288 
Stannie Oxide, Sn O. ... ep Le005% sis =, Obie. 
) 
Silica, ete., Si O ' 084% ss . 060% 
9 os 
100°00 100°00 
(Signed) W. KELLNER. 
CHEMICAL DEPARTMENT, 
12th Fanuary, 1893. 
CHEMICAL DEPARTMENT, 
ROYAL ARSENAL, 
WOOLWICH, 
10th August, 1843. 
Sir,—I regret that a reply to the question dated 17th January, 
and reminder of the 26th ultimo, as to the commercial value of wolfram, 
has been so long delayed. There has been considerable difficulty in 
obtaining reliable information on this point, and only quite recently have 
I been furnished with statements of any practical value. The following 
are quotations for wolfram :— 
A lot of 10 tons, 49 per cent tungstic acid : 
8s. 6d. per unit per cent of tungstic acid, or £20 16s. 6d. per ton, 
free on rail at the mine. 
