Chap. XXXIV.] ciiiiindwara : gowari waeiiona. 
797 
Hence for every 10 feet, measured down the dip of the rocks, that 
the ore extends in depth with the above thickness and qualit}-, 8, .WO tons 
of ore might be extra(;ted. Taking 40 feet as the maximum depth to 
which it might be profitable to extract the ore under present conditions, 
we see that there is a possible yield of 34,000 tons of ore from this 
deposit ; if the deposit continue in depth of the same q^iality and thickness 
as at the surface. 
Since the foregoing was written T have been able to revisit the deposit 
(December 1907). By this time a considerable amount of work had been 
done on the deposit, in the form of the usual opencast excavations. This 
work has shown that the ore-band is much less regular than one would 
suppose from the outcrops and prospecting pits and trenches first con- 
structed. Thus to the east of the nala section (B) a dyke of a coarsely 
crystalline rock, composed of pinkish felspar with a little quartz, has been 
exposed, cutting across the ore-band nearly at right angles. It strikes 
E. 40° N., is practically vertical, and has a width of 3 to 4 feet. In some 
places the ore-band is doubled on itself and sharply folded. Towards 
the west end the ore-band is often broken, disappearing in places owing 
to pegmatitic intrusions. In one place the ore-band has apparently 
been faulted horizontally for a few feet. 
Three sorts of ore are found in this deposit. One is the usual very 
Nature and quality fine-grained braunite-psilomelane mixture, another 
of the (lies. jg a mixture of these two minerals in which the 
braunite predominates and is in crystals up to | inch in diameter ; the 
third is made up of small parallel prisms of a manganate, to which the 
name hoUandite may be extended. This type of ore tends to form the 
outside of layers of ore, of which the inside is composed of the first variety. 
I selected a piece of the last variety for complete analysis at the Im- 
perial Institute. It showed a layer of the crystalline prismatic mineral 
of a shining light steel-grey appearance resting on ore that seemed to be 
composed of a mixture of this crystalline mineral with braunite. The 
analysis is as follows : — 
Specimeii No. 7^2 (16-998). 
Manganese peroxide . . . . . . . . . 70"84 
Manganese protoxide ......... 14' 21 
Ferric oxide . . . . . . . . . . . 4'91 
Alumina 0 • .36 
Baryta 6-18 
Lime 0-47 
Magnesia O'SO 
Combined .silica . . . . . . . . . . 1 • 23 
