■ 48 Miscellaneous Localities of Minerals. 



3. Purple Copper, at Chesterfield, (Mass.) It occurs in 

 small quantities in the same rock with the green feldspar. 



4. Finite, beautiful specimens of this mineral have re- 

 cently been found in Lancaster, (Mass.) by Mr. Charles- 

 Stedman of that place. It occurred imbedded in quartz^ 

 at one spot, and at another, in porphoritic granite. It is 

 crystallized in six-sided prisms, terminated by planes. The 

 solid angles, and the terminal edges of these crystals are 

 often replaced by planes ; and the lateral edges in some in- 

 stances, from numerous truncations, are entirely effaced, the 

 crystals becoming cylindrical. Their predominating aspect, 

 however, is a four-sided, rectangular prism, owing to an 

 undue extension of four sides of the primitive form. These 

 crystals, although easily broken in almost any direction, 

 separate best in directions parallel to their bases. Thej 

 vary in magnitude, from two inches to three fourths of an 

 inch in length, and from one to one third of an inch in 

 diameter. They present several colors. Those of a dark 

 brown, tinged with green, and the red are the most abun- 

 dant. Tlieir lustre is likewise very various. Some are 

 almost dull, while others are quite glimmering. The 

 dark colored crystals are opaque, but the lighter are trans- 

 lucent. When reduced to a powder, and moistened by 

 the breath, they emit a strong argillaceous odour. 



6. Kolice of Pebbles from Cape Horn. 



By Steuben Taylor. 



Nezo-Hartjord, October, 1824. 

 Prof. Silliman, 



Sir — I have for a number of years been gradual- 

 ly making a collection of pebbles. I have long believed 

 that ihey would eventually be deemed as curiosities, 

 and receive a place in the cabinets of those devoted to the 

 study of natural science. I have recently obtained be- 

 tween five and six hundred which were gathered on 

 the shores of Cape Horn. They present a truly inter- 

 esting appearance. They have all a smooth surface, even 

 those which are of a coarse texture ; and some of them 

 exhibit almost as fine a polish as if they had come from 



