Chap. XXX.] 
SAHARA : YERUti. 
most ore ; and, as the following analysis of a sample taken here shows 
also that which yields the highest grade ore : — 
Sample No. A. 51. 
Manganese peroxide . . . . . . . 68 • 76 
Manganese protoxide . . . . . . .2-79 
Ferric oxide 7-14 
Baryta 2-99 
Silica (combined) . . . . . . . . 3-90 
Silica (free) ......... nil. 
Phosphoric oxide . . . . . . . .0-14 
Arsenic oxide ........ 0-023 
Water (combined) ....... 3-70 
Moisture at 100" C 1-70 
This is equivalent to : — 
Manganese ......... 45-62 
Iron 5-00 
Silica 3-90 
Phosphorus 0-060 
4. Yepuli. 
The Yeruli plateau consists of Deccan Trap lavas, but has standing 
up from it three elevations, which are flat-topped and capped with 
laterite. On the plateau to the S. E. of the most easterly of these 
laterite caps, and about | mile east of the village of Yeruli, is another 
occurrence of manganese-ore. As usual the ore is found in 1| to 2 
feet of red clay resting on crumbly grey trap. The manganese-ore seems 
to have formed as pisolitic concretions in the clay. These are sometimes 
isolated, but, by the union of several of them, botryoidal aggregations 
are formed. Flat concretions also occur at times. 
A sample taken here was analysed by Messrs. J. and H. S. Pattin* 
son with the following result : — 
Sample No. A. 52. 
Manganese peroxide . . . . . . .58-04 
Manganese protoxide . . . . . . .1-80 
Ferric oxide . . - 13-00 
Baryta 2-63 
Sihca (combined) . . . . . . . .4-70 
SiUca (free) 0-05 
Phosphoric oxide ........ 0-225 
Water (combined) 6-50 
Moisture at 100°C 1-75 
This is equivalent to ; — 
Manganese 38-08 
Iron 9-10 
Silica (total) 4-75 
Phosphorus 0-098 
