58 THE THERMAL SPRINGS OF SELANGOR AND MALACCA. 



Iron, Alumina and Manganese, 0.125 parts in 10,000. 

 Hydrogen Sulphide, ... ... 0.019 ,, „ 



Carbonic Acid, 



Nitrogen, 



Silica, 



Organic Matter, 



0-45° » „ 



0.089 



0-595 

 0.195 



2.82318 parts in 10,000 



Composition of Gases escaping from the Springs. 



A number of analyses were made of the gases which are 

 given off by these hot springs, and they were found to consist 

 principally of Nitrogen and Carbonic Acid with small quanti- 

 ties of Hydrogen Sulphide and Marsh Gas. 



Therapeutic Value of the Springs. 



In my remarks upon the general nature of the springs, I 

 have already pointed out that they must be classed with simple 

 thermal waters, as they contain but an insignificant amount 

 of solid matter excepting Silica which has but little physiologi- 

 cal action. All the springs, however, contain Hydrogen 

 Sulphide, and although the quantity present is sufficient to 

 warrant their being classed with " Sulphurous Waters " in the 

 strict sense of the word, yet it suffices to impart to them a 

 distinct therapeutic value. In addition to this, their tempera- 

 ture is an important item, considered medicinally. There are 

 a number of well-known springs in Europe, which owe their 

 virtues apparently to their temperature only and contain as 

 little or less mineral matter than the Selangor springs and 

 less Hydrogen Sulphide or none at all (Matlock; Buxton; 

 Wildbad; Aix en Provence). 



Among the Selangor springs Ulu Klang ranks first as 

 possessing the highest temperature and containing most 

 Hydrogen Sulphide. The remainder may be placed in order 

 of merit thus: — Setapak ; Dusun Tua ; Semunieh ; Gombah. 

 Ulu Selangor would probably be the last in the list, although 

 I cannot say so definitely, as I did not personally inspect and 

 examine this spring. In any case it would come after Setapak 



