42 Notice of the locality of Sulphate ofBarytes, SfC. 



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. Yellotv blende, very beautiful acconnpanying foliated 

 carbonate of lime these substances reciprocally intermix 

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

 companies the sAo^ 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. VIII. — Notice of the locality of Sulphate of Barytes, 

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

 en ; (See p. 325 Vol. IV. of this Journal,) and of va- 

 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 in B. (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- 



