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MINER A LOG I CAL DESCRIPTION OP THE ISLAND OR BANKA. 415 
the clay which was mixed with it... 0 „ 
3. Fragments of siliceous stones mixed with amygdaloids, in this 
stratum the ore of tin was dispersed, at the bottom of which 
4. A layer of white earth ; extensive surfaces of which remain¬ 
ed exposed on the grounds from which the other layers had been re¬ 
moved. - 
On examining the stones which remained at the aqueducts I was 
forcibly struck with the abundance of amygdaloids, w 7 hich were mix¬ 
ed with the siliceous fragments and which made a striking contrast 
with the appearances observed only a few days before at the mines 
of Mampang. These amygdaloids appear to have been accumulat¬ 
ed in particular strata, as I observed in some places most of the 
stones that remained after the washing of the ore were of this na¬ 
ture. 
At a small distance from the mine which is at present worked I 
found a large vein of Red-Iron-stone : Those parts which project¬ 
ed from the surface formed several extensive rocks in a half recum¬ 
bent position. The fracture is similar to that of the same stone 
found on the road from Jehus to Klabbet, above mentioned, partly 
ochreous, partly metallic. It appears, by its gravity, to contain a 
large proportion of Iron. Not far from this rock were several loose 
fragments of a sandstone of a fine grain and reddish colour, marked 
and crossed by very regular lines of different shades. From this 
mine I proceeded to the village of the Batin or native chief of the 
district of Sungie-bulu : the course of the road had hitherto been 
nearly westward ; it now took a more southern direction. About a 
mile beyond the Batin’s village I passed an extensive track covered 
wdth Red-Iron-stone, the principal rocks were fixed and projected 
considerably beyond the surface : The specimens collected, resem¬ 
ble those found at the mine last described. They contain a large 
proportion of Iron. 
The mines of Tayu belonging to Sungie-bulu and those of Tdy- 
ndm and Sedm, are situated at the south-west extremity of the dis¬ 
trict of the mines, at no great distance from the road. I passed a- 
long an extensive aqueduct of the mine of Tayu, which had lately 
