Chap. XL.l 
VIZAGAPATAM : KODUR. 
1071 
taken from a stack of such material and composed of compact pyro- 
lusite, with cavities Uned with mamniillated pyrolusite, was subjected 
to complete analysis by Messrs. J. & H. S. Pattinson with the result 
given on page 82 of Part 1. The analysis there given is equivalent to : — 
Specimen No. A. 197. 
Manganese -VJ-IH 
Iron 0-05 
Silica <total) 0-.50 
Phosphorus ...... . . 0-41 7 
It will be seen from the above that this is very high grade ore, 
characterized by very low iron, and high manganese and manganese 
peroxide ; it should be suitable for glass manufacture and chemical 
purposes. 
From some 90 tons of Kodur ore lying at Garividi Railway Station 
ready for despatch I took sample A. 27. This consisted of the various 
varieties of cavernous psilomelane with scattered specks of braunite 
and a few braunite patches. It was partially analysed by Messrs. 
J. and H. S. Pattinson with the following result :— 
Sample A^o. A. 27. 
Manganese peroxide ... . . 57"19 
Manganese protoxide . . . . . . 14 "IS 
Ferric oxide 1.3-85 
Baryta 220 
Silica (combined) . ...... 2*93 
SiHca (free) 0 20 
Phosphoric oxide . . ..... 0-438 
Arsenic oxide ....... 0 005 
Wat^r (combined) ...... 3-30 
Moisture at 100" C 'VC5 
This is equivalent to : — 
Manganese ........ 47-11 
Iron 9-70 
Silica (total) , 3-l5 
Phosphorus . . . . . . . 0-191 
and indicates the presence of nearly 30 % of braunite. 
In the following table the first two analyses were given by Mr. 
H. G. Turner in Jour. Iron Steel Inst., No. II, for 1890, page 1(50, whilst 
the figures in the 3rd and 4th columns were kindly supplied by Mr. T. 
Caplen, manager of the Vizianagram Mining Company, Limited. 
