538 W. R. Jones — Supposed Occurrence of Tin in Springs. 



It is not clear from Dr. Bott's paper whether the mineral specimen 

 analysed by Meunier was obtained from Aver Panas (' hot water ') or 

 from Cheras, and as there are two places named Ayer Panas in 

 Malacca at both of which are hot springs, and as Cheras is north of 

 the State of Malacca and in the State of Selangor, some doubt exists 

 as to the exact locality from which the specimen was obtained. All 

 these springs, however, have been examined recently. 



At Ayer Panas, near Jasin in Malacca, there are six hot springs 

 within a circle of about twenty yards diameter, and probably connected 

 together below the surface. The difference in temperatures of these 

 springs is probably due entirely to the different distances from the 

 main spring and to different proportions of surface-water with which 

 they are mixed. The writer visited tliese springs during dry weather, 

 and this accounts probably for the higher readings he obtained 

 compared with those of Dr. Bott : — 



Dr. Bott in August to September, 1890. 



No. 1. 45°C. No. 2. 35°C. No. 3. 45°C. No. 4. 52°C. No. 5. 55°C. 



W. B. Jones in July, 1914. 



Tank A. 56-5° C. Tank B. 52-5° C, 52-3° C. 



The springs are in a padi swamp. The smell of sulphuretted 

 hydrogen can be distinguished several yards away from the springs. 



At Ayer Panas, near Alor Gajah in Malacca (at the 19th mile 

 on the Tampin road), one spring is enclosed in a bricked well, and 

 the other rises a few feet away. 



Dr. Bott. W. E. Jones. 



Water in bricked well . . . 55° C. 56° C. 



Water in brook . . . . 40° C. 52° C. 



The smell of sulphuretted hydrogen is distinct near the springs. 



Granite is in situ less than a mile away, and its junction with 

 mica-schist on the Alor Gajah side may be not far from the hot 

 springs. On the Tampin side the junction was seen near the 2 If mile. 



At Cheras, about 3f miles from Kajang in Selangor, the hot spring 

 rises in low ground covered with high grass, and in wet weather it is 

 swampy. The highest temperature obtained was 46-25° C. There 

 is a distinct smell of sulphuretted hydrogen in the neighbourhood. 

 Granite is exposed on the road between Cheras and Dusun Tua, and 

 further work would probably show that granite outcrops not far from 

 the Cheras hot springs. 



There are hot springs at Dusun Tua in Selangor, and these issue 

 from a fracture in tourmaline-granite. In a bricked well a tempera- 

 ture of 72-1° C. was registered. The smell of sulphuretted hydrogen 

 can be distinguished a hundred yards from the spring on certain days, 

 and the water tastes of this gas. 



On a Chinese rubber estate near Ulu Yam in TJlu Selangor a hot 

 spring rises within a few yards of the junction of the granite and 

 mica-schist. The granite contains a little cassiterite in this neigh- 

 bourhood. Sulphuretted hydrogen is present in the water. 



Below are given Dr. Bott's analyses of these waters, and it will be 

 noticed that he has allocated the acids, as was generally done in those 

 days, to their presumed bases. 



