624 MANGANESE DEPOSITS OF INDIA : DESCRIPTIVE. [PaRT IV : 
is a well-marked outcrop in which limonite is scarce, the rock being 
chiefly psilomelane, with some p}Tolusifce. It is of the usual cavernous 
lateritic type and shows in places remains of sericite. This very mangani- 
ferous portion of the outcrop has a length of 70 paces, is 50 feet wide and 
rises to perhaps 15 feet above the remainder of the midulating hillocky 
groimd on which it occurs. A sample of ore from here gave the following 
partial analysis (by Messrs. J. & H. S. Pattinson) :- 
Sample No. A. 36. 
Manganese peroxide (Mn02) . . . . . . .29 -60 
Manganese protoxide (MnO) . . . . . . . 2'53 
Ferric oxide (re203) 36-57 
Baryta (BaO) 0-79 
Silica (combined) . . . . . . . . .5-08 
Silica (free) 11-50 
Phosphoric oxide (P2O5) . . . . . . . .1-61 
Combined water (H 0) . . . . . . . . 5-70 
Moisture at 100°C l-QO 
This is equivalent to : — 
Manganese (Mn) 20-66 
Iron(re) 25-60 
Silica (total) 16-58 
Phosphorus . . . . . . . . . .0-70 
Irregular outcrops of limonite, in places very manganiferous, stretch 
for 200 — 300 yards to the south-east, and then continue E. 35° N. along 
the south-east edge of the north-east one of the four hillocks shown on 
the 1-inch map of this area. The limonite here is sometimes very good, 
but also frequently very siliceous. A sample taken all along these 
outcrops yielded the following results (J. & H. >S. Pattinson) : — 
Sample No. A. 37. 
MnO 5-94 
MnO 0-60 
re203 59-00 
BaO 0-26 
Si02 (combined) . . . . . . . . .6-35 
SiC2 (free) . . . 11-75 
P2O5 2-75 
H2O (combined) 7-90 
Moisture at 100°C 1-40 
This is equivalent to : — 
Manganese . . . . . . . . . .4-23 
Iron 41-30 
Silica (total) 18' 10 
Phosphorus . ^ . . . . . . .1-18 
