246 
[voL. xm. 
Records of Ike Geological Simey of India. 
height. Its coui’se into the hill is very irregular; the descent for the first hundred 
yards is slight; beyond this the gradient becomes steep, not less than 60°; judging 
from the extent of the excavation, a rich pocket of ore must have been met 
with. At this point three sei^arate galleries extend into the hill somewhat 
oblique to each other. 
Beyond the extent of the excavations very little is to be seen in these galleries, 
as hardly a spec of copper has been left by the old miners, and the ends are 
choked up by fallen debris or filled with water. 
My guide through the mine had formerly leased it; and he acknowledged that 
the mine was abandoned from the failui'e of the ore in depth. But it is possible 
that in continuing the level southwards other pockets of ore would be met with. 
The mine is in a line with the Khetri mine, and it seems probable that many 
pockets of ore would be found if the intervening ground were explored. 
Some time since, repoid says about a hundred years ago, the roof of the gallery 
for about 100 yards from the mouth fell in, and a vertical face of the quartzites has 
been left standing in which numerous thin strings and nests of ore are exposed. 
I was told that this was the mode of occuiTence of the ore in the mine. In 
the bottom of the gallery only a few traces of copper are to be seen, thus showing 
that these strings or small veins did not extend, at this place, to any depth 
through the quartzites. 
Considerable quantities of blue vitriol (sulphate of copjDer), alum, and 
copperas (sulphate of iron), are now manufactured both at Khetri and Singhana 
from the decomposed slates and the refuse of the mines. The slates are steeped 
in water, which is afterwards evaporated in large iron vessels, when the blue 
vitriol is first crystallized out, afterwards the alum and lastly the copperas. 
Mr. Mallet found traces of nickel and cobalt in all three of these substances. 
The blue vitriol is sold for ... Rs. 14 per mauiid. 
alum „ ... ... „ 4 
„ copperas „ ... ... Re. 1 „ 
The Bahai workings are in a line with these two mines and on the same band 
of slates, about 8 miles south of Khetri. The workings consist of a few pits 
sunk in the hill side. A little copper is found disseminated through the slates, 
but I believe the jjits are principally worked for Saita, or ore of cobalt, of which 
mention will presently bo made. 
The next mine of importance is that of Daribo, near Kho, in the Ulwar terri¬ 
tory. The mine is situated in a sharp anticlinal bend in slates and quartzites. 
An adit level is driven into the hill through the slates in a southerly direction 
parallel to the sti’ike of the rocks. I could see no trace of a lode ; the ore appears 
to bo irregularly disseminated through the black slates, a few specs and stains 
only being seen in the quartzites. Where richer nests of the ore were met with, 
the miners have extended their workings a short distance above and below the 
level. The miners declare that a rich nest of ore occurs in a pit sunk below 
the level near its southern extremity, but it had to be abandoned on account 
of the water. 
