G. Hagemann on minerals with Cryolite in Greenland. 93 
Magnetic oxyd of tron—This ore of iron is found in great 
abundance associated with the emery, and is worked for the 
manufacture of iron; it contains a little oxyd of titanium. 
The above, as well as some other associated minerals of less 
importance, justify the concluding poten of my paper on 
emery fifteen years ago, viz: o not risk much in saying» 
that the hydrate of aluinina or diensite as well as the — 
or emerylite, chlorite or tourmaline, and the minerals of iro 
as magnetic, titaniferous iron, Xc., will be found almost mbes 
where with the emery and corundum.” 
ArT. XV.—On some minerals associated with the Cryolite in 
. Greenland; by G. HAGEMANN. 
A notice of the pachnolite, discovered by Prof. Knop in the 
Greenland cryolite, has already appeared in this Journal." On 
examination of several cargoes of eryolite imported by the 
Pennsylvania Salt Manufacturing Company, I have not only 
found pachnolite, but also have observed some other minerals 
which may be of i interest. 
with that noticed by Prof. Thomsen. 
The mineral crystallizes in dimetric form, the dimetric pyra- 
-mid and prisms being plainly seen, but no further crystallo- 
graphic examination was made. Tt has a distinct basal cleav- 
age. The color is white with a reddish tinge, the crystals 
have a bright luster, and are coated with a white earthy en- 
velop (Si!). Sp. gr., 274-2 ‘76; hardness, about that of eryolite. 
Heated in the closed tube this mineral yields water with an acid 
reaction hie ae the glass. At a higher temperature it 
* Vol, sli, p. 119. 
