436 Scientific Intelligence, 



•tremity on the two solid angles of the most obtuse lateral 

 edges, forming diedral terminations at each ex- 

 tremity of the prism. The faces of these ter- 

 minations were inclined to each other at an angle 

 of 67° and a few minutes. The annexed figure 

 shows the form of the crystal* 



6. Supplement to the " Remarks on the Geology and Mineralogy 

 of a Section of Massachusetts, on Connecticut River, 4'f." 

 contained in No. 2, Art. I, of this Journal, by E. HixcHf 

 COCK, A. M. 



The following minerals, found in the region above named, 



were either omitted in the former list, or have been noticed 



since that was made out. 



Bog'iron Ore. In Greenfield and Warwick. 



Hornstone. Rare ; in Deerfield and Conway. 



Siliciqus Slate. In rolled pieces, on the banks of Deerfield 

 river ; not abundant. 



Basanite, or Lydian Stone. Same locality. 



Augite. In an aggregate of greenstone, quartz, and calcareous 

 spar, in the greenstone range, Dperfield. Colour 

 black, and the crystals usually imperfect, or broken. 



Staurotide. In mica slate, Northfield, one mile east of the 

 village, on the turnpike to Boston. The crystals ob- 

 served were six-sided prisms. The same rock con- 

 tains reddish garnets, 



THE LEVERETT RANGE OF GRANITE. 



This name is given to a granite range that emerges from 

 the puddingstone near the centre of Amherst, and extends 

 northerly, with some interruption, nearly thirty miles, through 

 Leverett and Montague to Northfield. And, indeed, there is 

 some reason to suppose that it again appears to the north of 

 Northfield. The range is widest in Leverett, where its 

 breadth is more than a mile. It is noticed in the " Remarks," 

 No. 2, Art. I, of this Journal, apd may be seen on the seclifln 



