Chap. XXXVT.] 
NAGPUR : WAREGAON. 
931 
on cargo lots, and then decreased to 50 per cent., and after that to 
47 per cent., on the last cargo sent, which was reported to be very 
arsenical. Eight partial analyses by Messrs. J. and H. S. Pattinson 
of various types of ore from this quarry, kindly supplied by Messieurs 
Jambon and Cie, show the following limits and mean : — 
IJinits of 8 nnalyses . 
Aieaii of 8 analy- 
ses . 
Manganese 
Iron 
Silica 
Phosphorufi 
Moi.sdire . 
45-16 to 56 -10 
4-46 to 14-24 
1 -23 to 9 -56 
0-0.53 to C-088 
0-26 to 0-78 
50-45 
8-22 
6-88 
0-068 
0 -50 
Dried at 212° 
The manganese- ore being extracted from the new excavations men- 
tioned on page 929 was the hard grey finely crystalline variety with 
bands of softer ore. Sample 30 was taken here, and many of the pieces 
of ore included in it had slight ferruginous and clayey coatings. The 
analysis by the Imperial Institute gave the following result : — 
Sample No- 30 . 
Manganese peroxide . . . . . . . .48-66 
Manganese protoxide . . . . . . . .25-73 
Ferric oxide 9-88 
Silica (combined) . . . . . . . . 5-]6 
Silica (free) 0-80 
Phosphoric oxide . . . . . . . . O'lG 
Moisture (at lOO'C.) 0-(i5 
This corresponds to : — 
Munsranesc 50-73 
Iron 6-92 
Silica 5-96 
Phosi)horiis 0-070 
Moisture . . . . . . . . . .0-65 
which is sufficiently close to the mean of the 8 analyses of ores from 
the main pit to show that the ore from these new pits is of the same 
qualitv as that from the old quarry. The above analysis indicates a 
composition foi the ores of about equal parts of braunite and psilomelane. 
For an analysis of Waregaon and Kacharwilhi ore stacked at Tharsa 
station, Bengal-Niigpur Railway, previous to despatch, see page 927. 
The analysis of the ore sorted from the waste heaps during 1906 is 
given by Mr. Coggan as : — 
JIancanese . . . . . .. . • .52-14 
Silica S-M 
Phosphorus 0-081 
IV 
