SARAWAK MINERALS.—- BY «T. S. GKIKTE. t201 
Sulphates. 
Gypsum. Occurs at Ayer Pan as near S'ennah as a 
deposit from the hot spring. 
Hydrocarbon Compounds. 
Coal . — Coal is found in a number of localities the 
most important being Sadong, Brooketon and Lingga. 
At Sadong a single seam has been worked for many 
years, at Brooketon there are two nearly vertical seams 
18 to 20 feet thick, whilst Lingga has not yet been ex¬ 
ploited but there is reported to be a good seam there, 
the outcrop of which can be traced for a considerable 
distance. 
Besides these, numerous occurrences are reported all 
along the coast from Sadong to the North; none of 
these however have as yet been prospected. 
Oil .—Mineral oil occurs in the Coal measures and 
follows the latter mineral in its geographical dis¬ 
tribution. 
Finds are reported at Sadong, Brooketon and Miri 
but none of these places has as yet produced oil in any 
quantity ; boring operations are however being carried 
on at Miri which have so for met with encouraging 
results. 
Mineral Resin .—Both the Sadong and Brooketon 
coals occasionally contain small pieces of Resin. 
