Chap. XXYIII.] tse as coLorEixG material. 
t)Ol 
obtained figures being £16-5-9. The violent fluctuations are probably 
due to great variations in the quality of the ore, rather than to vari. 
ations in price. And it must be remembered that the price for any 
given year is probably below that of the best ore, because the value is 
calculated on the whole of the ore produced. 
Table 92. 
Quantity and value of the Canadian manganese-ore 'production from 
1893 to 1905. 
Quantity. 
Total value. 
Value per ton. 
Tons. 
$ 
$ 
1893 
133 
12,521 
94-14 
1894 
56 
3,120 
55-71 
189.5 
108-3 
6,351 
58-61 
1896 
123-5 
3,975 
32-19 
1897 
15-25 
1,166 
76-46 
1898 
11 
325 
29-55 
1899 
70 
2,410 
34-43 
1900 
34 
1,720 
50-59 
1901 
440 
4,820 
10-95 
1902 
172 
4,062 
23-62 
1903 
135 
1.889 
13-99 
1904 
123 
2,706 
22-00 
1905 
22 
1,720 
• 
78-18 
Manganese-ore might also be used for the preparation of bleaching 
powder in India, for which there would pro- 
Use of manganese for j j£_ t t 
bleaching powder, bullion bably be a demand from the Indian paper 
melting, and potassium mills. I also imderstand that manganese 
permanganate. peroxide has been used on the Kolar Gold 
Field to assist in the oxidation of the zinc when the auriferous preci- 
pitates obtained in the cyanide process from the zinc boxes are being 
converted into bulhon. Large quantities of potassium permanganate are 
used in India as a disinfectant. It is a pity that this material should 
be imported when the material, namely manganese-ore, from which it 
is made, exists in such abundance in India. 
Use as a Colouring Material. 
From very early times there has probably been a small consumption 
„ , , of manganese-ore by the natives of India 
Use of manganese for i • i " i 
colouring glasses and ena- for colouring glasses and enamels, it being 
possible to impart green, \-iolet, brown, and 
