432 



DESCRIPTIVE MINERALOGY. 



Fig- 517. Fig. 518. gravity. Figs. 517 and 518. P on a about 



128° ; P on 6 or P' on 6 123° 14'. 



The same mineral, in crystals similar to 

 those just noticed, is found two miles south of 

 the village of Amity, associated with crystal- 

 lized serpentine, etc. 



There is another locality four miles west of the village of Edenville in the same tovra, where 

 ilmenite occurs in crystals and grains. It does not act upon the magnet in the slightest degree. 

 It is associated with spinelle, chondrodite, hornblende and copper mica in white limestone. 

 Dr. Horton states that a crystal was some years since found at this locality, two inches in 

 length. 



Some interesting localities of this mineral also occur in the tovra of Monroe in this county. 

 One of these is the Stirling iron mine, where it is found in small but well defined crystals, 

 the larger ones usually having rounded angles. The colour is not so black as that of the spe- 

 cimens from the neighbourhood of Amity. It slightly affects the needle. It is associated 

 with hornblende, feldspar, and the magnetic iron ore. 



The same mineral is also found near Greenwood furnace, with spinelle and chondrodite ; 

 and at the Crossway mine, in crystals and grains with hornblende, cleavable p3rroxene and 

 magnetic iron ore. 



Ilmenite, in rounded and imperfect crystals of an iron black colour, is found in quartz, 

 associated with reddish brown zircon and magnetic iron ore, on Deer hill in the town of Corn- 

 wall. 



Prof. Shepard notices the occurrence of what he denominates Crichtonite, in broad lami- 

 nated imperfectly hexagonal masses at Washington, Connecticut, and likewise in the eastern 

 part of the same State. 



Many of our magnetic and specular iron ores contain variable proportions of titanic acid, 

 as is proved by analysis, and by the fact that metallic titanium often results from their reduction. 

 One of the most remarkable specimens of this kind is from Alexandria in Jefferson county. 

 The term titaniferous iron ore, applied to certain compounds of titanic acid and the oxides of 

 iron, is still very vaguely employed. It is more than probable that two or more distinct mine- 

 rals are now included under it. 



