910 
MANGANESE DEPOSITS OF INDIA : DESCRIPTIVE. [PaRT IV : 
Five analyses of specimens and samples of ore from Mandri, by Messrs. 
J. and H. S. Pattinson of Newcastle, kindly supplied to me by Messieurs 
Jambon and Cie., showed the following limits and mean : — 
Manganese 
Iron 
Silica 
Phosphorus 
Moisture . 
Limits of 5 analy- 
ses. 
51 -83 to 
3-83 to 
5-0.5 to 
0-0fi2 to 
0-4!t to 
55-04 
5-82 
7-06 
0- 156, 
1- 15 
Mean of 5 analy- 
ses. 
53-23 
5- 27 
6- 04 
0-10(i 
0-73 
while another specimen, described as ' yellow stuff, bad looking,' and 
doubtless spessartite-rock only partly altered, gave the following 
result : — • 
Manganese 25-22 
Iron ............. 16-61 
Silica 16-00 
Phosphorus .......... 1 -05 
Mr. Coggan has also supplied me with the following figures showing the 
average analysis of the ores raised at this deposit during the years 1905 
and 1906 :— 
I'JOS 
1906 
Manganese . 
51-87 
48-21 
Silica . 
6-30 
7-38 
Phosphorus . 
0-097 
0-120 
It will be noticed that the 1905 ore, when prices were comparatively 
low, corresponds roughly with that of my cleaned sample .32, whilst that 
of 190G, when prices ruled high, corresponds roughly with that of the 
material rejected in the cleaning of sample 32. This suggests that the 
poorer quality of the ore despatched during 1906 may not be the result 
of the deposit deteriorating in quality with increasing depth, but may 
be due to the fact that poorer ore could be exported at a profit in 1906 
than in 1905, in consequence of which the ore was perhaps not so carefully 
cleaned. 
Owing to the tortuosity of the ore- bands and their consequent very 
The workincr of the variable strike and dip, the working of the Mandri 
fle))osit. deposits is perhaps a somewhat more difficult 
problem than usual. They had up to December 1906 been worked 
by means of narrow cleft-like openings following down the ore, whilst 
very little, and in some places none, of the 'country ' had been touched . 
