Domestic. 401 



7. Sulphtiret of Mohjhdejia, ^c\— This was found by 

 Mr. Boyd, four and a half miles from Hamburg, N. J. im- 

 bedded in a mineral which is probably a variety of augite. . 

 It occurs in laminae, sometimes more than an inch in diameter. 

 In the same locality he found beautiful massive blue fluate 

 of lime. He also lirought with him several other rare mine- 

 rals, but as they were found a short time before by Profes- 

 sors Keating and Vanuxem, who are preparing an account 

 of them for publication, i think it would be improper in me 

 to anticipate them. 



8. Zircon from N. Carolina.— \ have made an accurate 

 goniometrical measurement of this mineral, and find the an- 

 gles to agree very nearly with those given by Haiiy. The 

 faces of the prism form with the corresponding angles [fa- 

 ces ? Ed.] of the prism, angles of 131° 35'. In the second 

 edition of Cleaveland's mineralogy, they are said to measure 

 about 135°. The angle of incHnation of two faces of the 

 pyramid 94° 30'. 



9. Smmnerville Copper-Mine. — I lately visited the cop- 

 per mine of Mr. Cammams, near Summerville, (New- 

 Jersey.) They are situated in a trap or Greenstone moun- 

 tain. The ore which is worked, is the red oxyd of copper. 

 The following are the principal minerals yet found there : 



Native copper., in irregular masses, weighing from one 

 ounce to eight pounds. One specimen lately found weighed 

 twenty three pounds. 



Phosphate of Copper, massive, and of a verdigris colour. 

 It generally accompanies the native copper. This mineral 

 is not noticed by 'CJeaveland, as a N. American species 



Carbonate of copper, green, and in coimection with the 

 phosphate. 



Red oxyd of copper. — The massive variety is the com- 

 mon ore of the mines. It is also found crystallized in octa- 

 hedra the surfaces of which are exceedingly brilliant. 

 Many specimens found at the mines exceed in beauty any 

 i have seen from Cornwall. 



Native silver, in small masses disseminated through the 

 phosphate and crystallized red oxyd of copper. 



Green quartz, in tabular, partly noded masses. A beau- 

 tifui mineral, resembling chrysoprase. 



