20 localities of Minerals in Massachusetts. 



large curvature within which the strata have less curvature 

 to the middle of the rock at F. The length of the stra- 

 ta from E beyond G is more than eight feet, a part only be- 

 ing shown on the plate, and the perpendicular depth 

 from G to the surface at H exceeds four feet. 1 he strata 

 above E G are much longer. The upper stratum E W can 

 be traced more than fourteen feet southward of the perpen- 

 dicular section. As a part of E W and some others of the 

 higher strata have been broken off, these strata below E W 

 are seen to continue parallel to E W. The part of the 

 rock which lay north of the perpendicular section, has 

 been broken up and removed- It was found to be com- 

 posed of concentric strata resembling those from D to F. 

 I have a specimen of one of the curvatures, whose span is 

 only nine inches, while the height of segment is three in-r 

 ches. 



Though the curvatures and tortuosities of many parts of 

 this bed of limestone, present very curious appearances, I 

 have seen none so large and singular as that described 

 above. Whether it resembles at all the globular masses 

 of rock mentioned by Bakewell and others, I am not able 

 to say. But it seems to me that the formation of this mass 

 is not easily accounted for by either the Wernerian or 

 Huttonian hypothesis. May it not be the result of a ten- 

 dency to crystallization, rather than the effect of pressure 

 from any cause ? 



Williams' College, Mv. nth, 1824. 



Art. V. — Kotice of several localities of minerals in Massa- 

 chiisetis, by Rev. Edward Hitchcock. 



Spodumene. 



The mineral described in Vol. VI , p. 225, and more 

 particularly V^oi. VII, p, 30, of the Journal of Science, 

 as white augite, turns out to beSpodumene It exists, not 

 merely in the locahty described in the above references, 

 but in various other parts of Goshen, especially in the 

 northern part, scattered in great abundance in bowlders 

 over the surface ; so that there is no danger that the local-. 



