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



of a geyser water which forms a siliceous deposit is given for 

 comparison. 



The soft vegetable and other matter which had accumulated at the 

 bottom of some of tbe disused wells was collected and tested for tin. 

 No trace of tin was found in a single case. 



It is a significant fact that the specimen examined by Meunier 

 gives an analysis strikingly different from all other ' opal deposits * 

 and * geyserites'. Below three analyses are given for comparison 

 with that of Meunier, and it will be noticed that whereas Meunier 

 obtained traces only of alumina, the other analyses show weighable 

 amounts of alumina and other metals. Out of a long list of analyses 

 of such minerals nothing approaching that given by Meunier has 

 been seen. 



Analyses of Siliceous Deposits. 



Weathered cassiterite-bearing quartz, having a "cavernous and 

 tuberculous structure, whitish grey colour, with small dendritic 

 particles in it", is very common near decomposed schists containing 

 cassiterite-bearing quartz veins, and near weathered pegmatite veins, 

 and there seems little doubt that the specimen sent to Meunier from 

 near the springs was originally derived from one of these sources. 

 Tin-mining has been carried on within a short distance of the hot 

 spring at Cheras. It remains to add that Meunier, as Dr. Bott 

 remarks, " could only work with a small sample sent to him in 

 France," and that " he never saw the springs nor the water fresh 

 from them ". 



At the bottom of Lahat Tin Mine in the Kinta Valley, Perak, 



Federated Malay States, a strong spring (not a hot spring) issues 



from the limestone on which rests the tin-bearing ground, and it 



sometimes happens that this spring brings up pieces of tin-ore of the 



■* Quoted in Data of Geochemistry, F. W. Clarke, 1911. 



