PAKT L] Mallei: On liranuik, with RJmhnile, from near Hagpnr. 
73 
On Bradnite, with Rhodonite, from near Nagpur, Central Provinces, hj 
P. R. Mallet, f.o.s.. Geological Survey of India. 
Some time ago, Mr. W. Ness, Mining Engineer in charge of the Warora 
Collieries, sent a parcel of about 20 lbs. of manganese ore to the Geological 
Museum, -with a notice of the locality in which it had been found. It appears 
from this that the ore occurs on the south-east side of Munsur Great Trigono¬ 
metrical Station, a hill tliree miles west of the town of RSmtek, which is about 
twenty miles north-east of NSgpur. Mr. Wilson, Executive Engineer of the 
Kanhan Division, w'ho has visited the place, describes the outcrop, which strikes 
north-w’est, south-east, as being visible for about a quarter of a mile, with a 
thickness of about 10 feet. Mr. Ness, however, is inclined to think that some 
portions are inferior to the samples sent to the Museum. 
The latter are finely-granular massive, wdth here and there portions which 
are indistinctly crystalline on a larger scale. The specimens are bounded on two 
opposite sides by planes which appear to be joint-faces, aj)proximately per¬ 
pendicular to which the mineral is intersected by irregular, more or less elon¬ 
gated cavities: the larger of these are about an eighth of an inch across, and 
some as much as three or four inches long: others ai’o visible only under the lens. 
Many of them are partially, or almost entirely, filled by a translucent, light 
brownish-red and yellowish, indistinctly crystalline mineral, which proved on 
examination to be rhodonite. 
The color and streak of the manganese ore are brownish-black. Hardness 
about 6'0. The sjiecific gravities of three different samples were 4' 22, 4'36, and 
4'46, the differences (and the inferiority in gravity to that of braunite in crystals) 
being doubtless partly due to minute cavities. 
On analysis the mineral yielded, counting all the manganese as sesquioxido, 
according to the formula more usually adopted for braunite— 
Manganese sesquioxide 
78-64 
79-39 
Iron sesquioxide 
9-78 
9-87 
Lime ... 
1-20 
1-21 
Magnesia 
tr. 
tr. 
Oxygen in excess of that required for 0^ 
... 1-65 
1-67 
3dica ... 
6-00 
6-06 
Phosphoric acid 
■21 
•21 
Combined water 
2-61 
2-63 
Hj'groscopic water 
•60 
Lissomiiiiiiated rhodonite 
•35 
... 
lOlOl 
101-04 
The second column gives the composition exclusive of hygroscopic moisture 
and thodonite, scattered minute grains of which can generally be detected by tlio 
lens even in the most homogeneous specimens. Being but little acted on by 
K 
