42 ^Giice of the locality of Sulphate ofBaryfes, ^c. 



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the red oxide of zinc. It was analyzed in France by Ber- 

 thier and found to consist of iron manganese and zinc. (See 

 Vol. 2, p. 323 of this journal.) — Dr. Meade. 



43. Yellow blende, very beautiful accompanying foliated 

 carbonate of lime these substances reciprocally intermix 

 ivith each other and form an elegant combination. It ac- 

 companies the shot ore mentioned above and the red oxide 

 of zinc. Sparta, New-Jersey — Id. 



44. Vegetable Impressions of ferns and other plants re- 

 markably distinct in transition slate, Providence, R. Island 

 Mr. Geo. T. Bowen. 



Art. VIIL — JYoiice of the locality of Sulphate ofBarytes, 

 from which a specimen was analysed by Mr. G. T. Bow- 

 en ; (Seep, 325 f^oL IV, of this Journal^) and of v a- 

 rious other mineral localities in Berlin Conn,; by Dr* 



Jas. G. Percival. 



TO PROFESSOR SILLIMAN. 



Sir^ 



The specimens of Sulphate of Barytes analysed by Mr* 

 G. T. Bowen were found in Berlin, about half a mile west of 



Kensington meeting-house, in a vein in a ridge of green 

 Stone. The immediate vicinity furnishes several very inte- 

 resting minerals. The township is part of the red sand-stone 

 formation extending from New-Haven through Connecticut 

 and Massachusetts to Northfield. The rock is there schis- 

 tose, generally soft and argillaceous ; sometimes the folia 

 are very thin and brittle. This rock in many places is 

 overlaid by green-stone. On the west and south sides of 

 the town is a range of trap mountains; the sand-stone rock, 

 where it first comes out from below the trap in Southington 

 and Cheshire, is changed, and approaches to conglomerate. I 

 do not recollect an instance of that form of sand-stone in Ber- 

 lin; in three points inB. (see the map,) the schist is convert- 

 ed into shale more or less bituminous. The green-stone lies 

 in ridges rather narrow, running quite directly north by east. 

 Sometimes the sand-stone can be very distinctly seen crop- 

 ping out below the green-stone on the west side of the ridg- 



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