Vol. 65.] LAHAT ' PIPE ' IN PERAK. 385 



the same character from top to bottom, 1 but for a few specimens 

 which will be noticed later. Angular pieces of cassiterite could 

 generally be seen in a hand-specimen, set in a deep-red matrix of 

 calcite and iron-oxide. Under the microscope, thin sections showed 



Fig. 2. — Section of the Lahat ' Pipe,' looking east-south-eastwards 

 (depth =300 feet). 



that the cassiterite was dotted about irregularly among the crystals 

 of calcite, and that in some cases the pieces of cassiterite consisted 

 of what appeared to be broken fragments of masses of radiating 

 needles. 



On dissolving away the calcite and iron-oxide, pieces of angular, 

 yellowish-brown cassiterite were obtained, mostly portions of short 



1 A specimen of the ore is to be found in tbe Imperial Institute Collection. 



