CiiAi'. XXXVI.] 
XACJPUlt ; LOIlUONGRl. 
detrital ore accumulations on the slopes of the mound, and the 
quartzitos, red clay, and vein (juartz, occurring in the ore-body. Hence 
the dumps or waii-heaps at this deposit are smaller in projwrtion to the 
amount of quarrying done than at any other deposit visited. It is a 
pity that no attempt is made here to find out the depth to which these 
ore-beds extend. As has been already explained, the ore-beds are at 
some places horizontal or but slightly dipping. If a pit were put down 
at such a point, it should soon penetrate into the underlying ' country,' 
unless there were a phenomenally great thickness of ore-beds at the 
point chosen. By my third visit (December 1907) the working of the 
ore-bed had just uncovered the underlying mica-schist in 2 or 3 places. 
Work was begun on this deposit in 1900, and up to the end of 1906 
over 107,000 tons of ore were extracted. It is surprising that a 
mining company could go on working such a deposit as this for 7 years 
before finding out how deep the ore went, when the geological condi- 
tions were so favourable that a pit some 20 or 30 feet deep would 
have shown this some years earlier ! 
The output from this deposit from 1900 to 1907 
Output. . r ,1 
is as lollows : — 
Year. Long tons. 
1900 . 3,404 
1901 15,395 
1902 . 19,140 
1903 7,207 
1904 1,331 
1905 20,922 
1906 39,970 
1907 40,418 
Towards the end of 1906, a trench some 30 yards long was dug at a 
Workings west of point about h a mile due west of the Lohdongri 
the village. mine, and immediately to the west of the village 
of this name. This revealed the existence of manganese-ore in situ. 
What I saw was a small thickness of ore -layers resting on micaceous 
schists, with a layer of coarse grained vitreous quartzite separating 
the two, the strike being probably east and west. The ore itself was 
medium-grained, hard and crystalline, with cavernous black spots. 
There was also some dull dirty black ore formed by the replacement 
of the layer of quartzite mentioned above. A specimen of ore brought 
from here consists of psilomelane mixed with a crystalline mineral 
looking like facetted braunite, but rather strongly magnetic. In 
one place I found vein-quartz containing radiate limonite. A pit 
dug 15 yards to the north of the trench showed very schistose musco- 
vite-gneiss. 
