62 THE THERMAL SPRINGS OF SELANGOR AND MALACCA. 



siliceous deposits mentioned in my paper. They do not 

 form in a few hours as stated, and the water does not 

 fill itself with them. 



6. No Sulphates, but about 1.4 grams Sodium Chloride 

 per litre. — The water naturally contains Sulphates, 

 and the Chloride amounts to 0.015 grams at most. 



7. The description given is that of common sinter met 



with in all hot springs, almost without exception. As 

 for the tin in it, it would be difficult in these parts to 

 pick up a mineral w r hich did not contain a trace of tin, 

 as is well enough known. There is absolutely nothing 

 remarkable in the presence of tin in this sinter, the 

 very granite upon which it grows carries traces of tin. 

 The bold theory of tin oxide being deposited from 

 water containing Sulphuretted Hydrogen is not com- 

 patible with chemical laws, is a chemical impossibility. 



1 desire to add that I have appended the above remarks 

 purely by way of correcting erroneous statements, and nothing 

 is further from my thoughts than " sitting on ,; the author of 

 them. It must be borne in mind that he could only work with 

 a small sample sent to him in France, and which probably- 

 arrived in a more or less altered condition. He never saw 

 the springs nor the water fresh from them. 



W. BOTT. 



