MR. J. B. SCRIVENOR ON THE 



[Aug. 1909, 



Fig. 3.- 



-Photograph of a specimen from the Lahat ' Pipe] preserved in the 

 British Museum (Natural History). 



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crystals, or poorly formed crystals, but in many cases small angular 

 masses of needles. A little quartz, sometimes with distinct crystal- 

 outline, was obtained. No tourmaline was found. 



Occasionally a little pyrite or chaleopyrite was met with in the 

 course of work, and I have been informed that it generally occurred 

 near the periphery of the pipe. 



Vughs containing calcite and chaly bite- crystals were encountered. 



The Origin of the ' Pipe/ 



In Kinta it is easy to differentiate two distinct types of tin-ore 

 deposits in limestone. One type yields ore that undoubtedly 

 crystallized from vapour or solution in the place where it is now 

 found, and we may (for convenience) refer to it as ' lode ' tin-ore. 

 The other type affords ore that has certainly been transported by 

 water, concentrated in fissures, and then converted into solid stone 

 by a calcite-cement derived from the walls of the fissure. The 

 Lahat ' pipe ' agrees with neither of these types : and, as no record 

 exists of similar but smaller deposits that have been worked in 

 past years, it must be considered as standing alone. 



