Hoffmann — New mineral occurrences in Canada. 151 



Silica __ _. 25-77 



Titanic oxide 19*95 



Alumina 3*21 



Ferric oxide . 9*69 



Ferrous oxide 8*01 



Manganous oxide 0*76 



Lime 31*76 



Magnesia 1 _ _ . 1-22 



100-37 



These figures do not afford a rational formula. If, however, 

 it be assumed that the iron represented as being present in the 

 ferrous condition, does not exist in the mineral as such (as 

 would appear to be justified by the fact that a very carefully 

 conducted qualitative examination failed to afford more than 

 the faintest reaction for ferrous iron), but that it resulted from 

 an interaction between titanium and iron sesquioxides during 

 the process of solution of the mineral (the titanous oxide being 

 converted into titanic oxide at the expense of a portion of the 

 oxygen of the ferric oxide, with simultaneous formation of 

 ferrous oxide), and the above analysis be recalculated in accord- 

 ance with this view, we obtain for the composition of the 

 mineral : 



Silica 25-77 



Titanic oxide 10-83 



Alumina .. 3-21 



Ferric oxide . _ 18-59 



Titanous oxide. 8'23 



Manganous oxide _ _ .:. 0*76 



Lime . 31*76 



Magnesia 1-22 



100*37 



which figures afford a formula closely analogous to that re- 

 quired for garnet, and according with that now generally 

 accepted for schorlomite. 



4. Danalite. 



A few crystals of what has been identified by Mr. R. A. 

 A. Johnston as the somewhat rare mineral danalite, have been 

 observed by him scattered through the feldspar of a vein-stone 

 composed of orthoclase, spodumene, and quartz, which was 

 found by Mr. A. P. Low, cutting syenite, on Walrus Island, 

 one of a group of islands lying off Paint Hill, east coast of 

 James Bay, Ungava district, Northeast Territory. 



The crystals are mostly minute, seldom exceeding a milli- 

 meter in diameter ; one, however, was found, — and that the 



