﻿268 Prof. How on the Mineralogy of Nova Scotia. 



The residue, or " coke/' consisted of a powder unchanged in ap- 

 pearance from that put into the crucible. 



The foregoing results indicate a semibituminous coal : the 

 mineral differs widely from the bedded coals of the province, 

 which, as before mentioned, are bituminous; some, indeed, are 

 so in rather a high degree. The mode of occurrence of this coal 

 (the only one I have met with here approaching anthracite) is 

 curious, and worth further investigation. 



Cannel Coal. — A specimen "from an 18-inch seam at Little 

 Glace Bay, Cape Breton," had the appearance of cannel coal, 

 gave a brown powder and a brownish-black streak, burned alone 

 when well heated in a flame, in a closed tube gave much volatile 

 matter, and left a rounded swollen coke. Proximate analysis 



gave me :- 



Moisture 083 



Volatile combustible matter 30*07 



Fixed carbon 44*42 



Ash . 24*68 



100*00 



The amount of ash here, though considerable, is smaller than 

 that in the well-known Scotch cannel from Capeldrae, which 

 gives, according to Fyfe, 25*40 per cent. The Volatile combus- 

 tible matter is evidently high enough, in proportion to the fixed 

 carbon, to mark the class of minerals to which the specimen be- 

 longs. This is the first example of Nova Scotian cannel coal yet 

 examined, unless, as would be right according to some authorities, 

 now perhaps diminishing in number, the remarkably rich oil-coal 

 which I have called stellarite * is made to belong to the class. 



Turgite. — This well-defined species may be recorded among 

 the minerals of iron met with in the province. It occurs with 

 brown haematite at Terry Cope, and at another locality, probably 

 in the same county of Hants, according to my own examination 

 of specimens sent me, and it will doubtless be found frequently 

 elsewhere in the same association. Both the specimens in ques- 

 tion afforded red powder, gave water on ignition, and decrepitated 

 violently in the forceps before the blowpipe. The mineral from 

 the last-mentioned locality was mixed with siliceous and calca- 

 reous matters ; w r hen these were deducted, the constituents of 

 the air-dried substance were : — 



Water 5*51 



Peroxide of iron . . . 94*49 



100-00 

 The formula of turgite, 2Fe 2 3 + HO, requires 5*32 per 



* Mineralogy of Nova Scotia, p. 24. 



