HARRIS. MINERALS. - 167 



crystals. These are sometimes distinctly imbedded in 

 the limestone, as in Tirey, and of different colours, brown, 

 black, greenish, and grey; while in other cases they 

 form separate masses adhering together in a granular 

 distinct manner, and impressing each other like the 

 grains of the pomegranate. The brown variety above 

 mentioned is occasionally found in this manner, and being 

 sometimes further intermingled with scales of mica, it forms 

 a compound of a highly splendent and singular appearance. 

 The last observation is almost too imperfect to be 

 mentioned, excepting as it may point out a defect to be 

 supplied by some other observer. It relates to asbestos 

 found in the neighbourhood of Nishishee, on the western 

 side of the country, and derived probably from some 

 bed of serpentine which I did not discover. Chance 

 must often combine with industry in finding those mi- 

 nerals or beds of rock which occupy so small a space 

 in a district of this difficult nature. 



