400 



UNITED STATES 



Zeo/?V^5... •Beautiful zeolites have lately been dis- 

 covered at Hobocken, New Jersey, filling up the 

 veins in the rocks of Stellstein and Jade which abound 

 thereabout* Zeolite imbedded in regularly chrys- 

 tallized basalt, of which there is a great abundance in 

 the vicinity, was found by Dr. Barton, near Reading^ 

 Pennsylvania.f 



Common Broiun Garnetts^ of various sizes, from 

 the smallest grain to 4 oz. are found near Philadel- 

 phia, imbedded in micaceous schistus. 



Emeralds have been found in Virginia, according 

 to Mr. Je(fei'son: and at Chesnut Hill, above Ger- 

 maiitown, near Philadelphia, in a granite, and also 

 in the neighbourhood of Chester, in Pennsylvania, by 

 Dr. Seybert. This last specimen resembles the be- 

 ryl of Siberia. ...Emeralds are also found in Mary- 

 land and South Carolina. 



Black Schoerl, is frequently found as a component 

 part of the granite of the United States. 



Several varieties of Hornblende occxxv in PennsyU 

 vania and New York. In the former state, large 

 masses of granite are intersected by it. 



Mica. This stone which forms an essential part 

 of many m^ountains in the United States, has long 

 been known under the names oi Muscovy glass. It 

 consists of a great number of thin laminae adhering to 

 each other, sometimes of a very large size. It is 

 found in various parts of New Hampshire, adhering 

 to rocks of white or yellow quartz^ and lying in /a- 

 min^^^ like sheets of paper. The most of it is white, 

 some is yellow, and some has a purple hue. The 

 largest le ives of this curious substance are found in 

 * Br. Mitch^m t ^^^^ anaPkys. Joumah' 



