THE THERMAL SPRINGS OF SELANGOR AND MALACCA. 55 



It will be noticed that within small distances of a foot or 

 even 6 inches the temperature varies very considerably. The 

 points marked x indicate places where the temperature was 

 taken, those marked © mark the entrance of feeders or "eyes" 

 of the spring, and naturally possess the highest temperature. 



Spring at Ayer Panas. 



The temperature of this water varies considerably in the 

 different tanks or wells in which the spring has been col- 

 lected. 



a. — Tanks inside house. 



No. 1 = 45 Centigrade ( 1 1 3 Fahrenheit). 



» 2 = 35° „ ( 95° , )• 



„ 3 = 45° „ ("3° „ )• 



„ 4 = 5^° „ (123° ,,. )■ 



b. — Tank outside house on ground immediately adjoining. 



No. 5 = 55 Centigrade (131 Fahrenheit). 

 c— Tank in padi swamp behind house. 



No. 6 = 5 2° Centigrade (125 Fahrenheit). 

 d. — Tanks in front of house in the field. 

 (Left) No. 7 = 33 Centigrade ( 91 Fahrenheit). 

 (Right) No. 8 =48° „ (118 „ ). 



Analysis of water taken from hottest tank, No. 5 :— 



Total solids dissolved in the water, 18.40 grains per gallon. 

 Hardness, ... ... 2.5 „ ,, 



Chlorine, ... ... 0.7 ,, ,, 



Free Ammonia, ... ... 0.05 parts per million. 



Albuminoid Ammonia, ... ... 0.05 „ ,, 



Constituents dissolved in 10,000 parts of the water: — 



Calcium Carbonate, ... ... 0.160 parts in 10,000 



Calcium Sulphate, ... ... 0.180 ,, 



Magnesium „ ... ... 0.015 » 



Sodium ,, ... ... 0.190 „ 



Potassium ,, ... ... 0.085 >> 



Sodium Carbonate, ... ...0.450 ,, 



Ammonium ,, ... ... 0.00018,, 



