230 MISCELLANEOUS NOTICES, 



district it occurs as an oxide in the usual boss-like aggre- 

 gations. 



Copper. — Some insignificant traces of Copper have been re- 

 ported to exist in the rocks forming the left hand entrance of 

 the Salak river in Santubong Ba) T . 



Lead. — Galena is now known to exist in Sarawak but 

 only in minute traces. It lias been lately discovered in 

 Southern Borneo also and is there associated with Arsenic. 



Antimony. — Since the date of my last note an attempt has 

 been made to follow up the numerous indications of antimony 

 in the Rejang to their common source, but hitherto without 

 much success. A small quantity of ore, however, has been 

 exported from the district, and it is at least probable that when 

 the exploration has been pushed farther in the direction of the 

 elevated country near the Tabujang Mountain there will be a 

 better result to record. The Sesang branch of the Kalakah 

 river has yielded traces of Antimony in addition to the locali- 

 ties previously mentioned. In the section on Antimony the 

 paragraph u Lodes in which the matrix is felspar are rarer" 

 and should read " are richer." 



Coal. — My remarks on this Mineral referred to the Silantek 

 (Lingga) coal and not to the Sadong coal at present being 

 worked by the Government. This latter is of inferior quality. 



Petroleum. — Mineral oil may now be included in the Sara- 

 wak list. Indications of its presence have been discovered in 

 Sadong ; but they are, I believe, of no importance from an 

 economical point of view. 



Tungsten. — A lode of a dark looking Mineral, which appears 

 to pierce the limestone hill of Busau from side to side, has 

 been pronounced to consist largely of Wolfram or tungstate of 

 iron and Manganese. 



Limestone, Clays, <f'c. — Inexhaustible supplies of limestone 

 are available in Sarawak. It can be quarried on the river side 

 within 25 miles of Kuching and it affords both ordinary 

 and hydraulic lime, each excellent of its kind. Plastic Clays 

 of the finest quality abound in various parts of the Territory 

 and are at present utilized solely for the manufacture of bricks 

 and coarse pottery. The country is not rich in ornamental 

 stones available for building or other useful purposes. The 

 only rocks of this description with which I am acquainted are 

 a pure white saccharoid marble (metamorphic limestone) in 



