THE THERMAL SPRINGS OF SELANGOR AND MALACCA, 47 



A number of analyses were also made of samples of air col- 

 lected close to the spring, and the following mean results were 

 obtained : — 



Oxygen, ... 20.88.s% by volume. 



Nitrogen, 

 Carbc 



Acid 



20. 



79-H5 

 0.06 



100.060 



The ammonia was determined separately and amounted to 

 0.055 P ar ts by weight in 1,000 of air. The air near the 

 spring differs consequently from ordinary air slightly by con- 

 taining a little more carbonic acid (0.06%, as against 0.03 

 to 0.04 in normal air). 



Gombak Spring. 



Temperature, ... 50-54 Centigrade (1 22-1 29 Fahrenheit) 

 Total solids dissolved in the water, 21.333 grains per gallon. 

 Hardness, ... 3.6 ,, „ 



Chlorine, ... 0.55 ,, ,, 



Free Ammonia, ... 0.04 parts per million. 



Albuminoid Ammonia, ... 0.05 ,_, ,, ,, 



Total constituents dissolved in 10,000 



parts of the w 



.9942, viz. : — 







Calcium Carbonate, 



... 0.26 parts in 10,000 



Sodium ,, 



... 0.22 



)> )) 



Ammonium ,, 



... O.OOI^ 



' )) m 



Calcium Sulphate, 



... 0.285 



a )> 



Magnesium ,, 



... 0.016 



j ? >) 



Sodium ,, 



... 0.199 



j> )) 



Potassium ,, 



... 0.093 



n j) 



Sodium Chloride, 



... 0.065 



i) >) 



Potassium ,, 



... 0.012 



i) )) 



Lithium ,, 







Sodium Sulphide, 



'.'.'. 0.018 



<> n 



