Chap. XL. 1 
VIZAGAPATAM : GARBHAM. 
1093 
I took 2 samples from the Garbham ore-stacks. They were as 
follows : — 
Sample A. 21. — 2nd grade ore from the stacks on the south side of 
the mine. Some of the pieces were almost entirely psilomelane, of 
tabular, shiny, and dull, botryoidal and cavernous varieties.' Others 
wore almost entirely soft pyrolusite, and some a mixture of pyro usite 
and psilonielant'. Some of the psilomelane contained mangan -magnetite. 
Many of the pieces showed small patches of hthomargic or ochreous 
matter. 
Sample A. 22. — From stacks of 3rd grade ore on south side of mine 
was similar in mineral constitution to A. 21, except that it contained 
a larger proportion of the various impurities, such as hthomarge and 
ochre. This could be best described as ferruginous manganese-ore. 
The analyses carried out by Messrs. J. & H. S. Pattinson are 
shown below : — 
Sample No. A.21. Sample No. A.22. 
Manganese peroxide . . . .67-75 52-76 
Manganese protoxide . . . . 5-12 6-88 
Ferric oxide 13-57 ' 22-42 
Baryta 0-53 0-36 
Silica {combined,! .... 2 45 4-15 
Silica (free) 1-65 2-15 
Phosphoric oxide .... 0-76 0*845 
Arsenic oxide ..... 0-021 
Water (combined) .... 3-50 3-80 
Moisture at 100° C. . . . • 0-50 0-50 
These are equivalent to: — 
Manganese ..... 46-78 38-67 
Iron 9-50 15-70 
SiUca (total) 4-10 6-30 
Phosphorus . ... . . 0-331 0-368 
Sample A. 21 is therefore barely up to 2nd grade Mn), whilst 
A. 22 is ferruginous manganese -ore. 
In the following table, the first three analyses were given by 
Mr. H. G. Turner in 1896 [Journ. Iron Steel /ns<. , No. 11 for 1896, 
p. 160), while the figures in the fourth, fifth and sixth columns were 
kindly suppUed by Mr. T. Caplen, manager of the Vizianagram^ 
Mining Co. 
