Miscellaneous Notices of Mineral Localities, fyc. 227 



the depth of half an inch, or more. I had not time to ex- 

 amine all the relations of this rock, and should not, therefore, 

 be surprised, if it should be found much more extensive than 

 above stated. I was not without suspicion, at first, that it 

 might be a variety of augite ; but it melts, without difficul- 

 ty, before the blowpipe, with intumescence, into a white ena- 

 mel ; whereas I was not able to fuse the augite, from the 

 same locality. 



As to the geological relations of this rock, I have no 

 doubt that it is connected with a primary series, consisting 

 of limestone, quartz rock, and mica slate. It is very tough, 

 and being regular in its stratification, it is a good material 

 for stone walls. 



September 8th. — Visited the most extensive bed of iron 

 ore in Salisbury, and the furnaces. Interesting as these ob- 

 jects are, they have been so minutely and repeatedly des- 

 cribed, even in this Journal, that a repetition is unnecessary. 

 At the old furnace, near the principal village, we found abun- 

 dance of cadmia thrown aside, of which the superintendant 

 very obligingly permitted us to take as much as we pleased. 



September 10th. — In passing over the mica slate, gneiss 

 and granite, occuring on the road from Canaan to Wood- 

 bury, we met with but little worth noticing, in regard to min- 

 eralogy and geology. Bowlders of limestone, containing 

 tremolite, are not uncommon in Goshen and the north part 

 of Litchfield. One mile south of Litchfield, I noticed trem- 

 olite in fetid quartz. In Litchfield (south farms,) and on- 

 wards to Bethlehem, are numerous bowlders of beautiful 

 porphyritic granite, and occasionally porphyritic gneiss. 

 The crystals of feldspar are uncommonly large. Bowlders 

 of these same rocks exist in great quantities, a few miles 

 northwest of N. Haven, in Woodbridge ; but I have not 

 noticed these rocks in place in Connecticut. 



We stopped in Woodbury at the public house directly op- 

 posite, and only a few rods, from the well known locality of 

 prehnite. We had been told that this locality was exhaus- 

 ted, but found it easy to obtain an abundance of very de- 

 cent specimens. We were told that a better locality had 

 been found on the east side of the hill ; but after wandering 

 in search of it for some time, we gave up the idea of finding it. 



I was gratified to find the character of the greenstone in 

 Woodbury so exactly like that along the Connecticut. I 

 observed also in a stone wall, near the prehnite locality, a 



