Domestic. 399 



of rocks on its soutfjern side. In this was abundance of ice 

 and snow, some of which will probably remain through the 

 year. The hand of man will probably destroy these natu- 

 ral depositories of snow, and, in a f^w years tliey will doubt- 

 less be known only as the places in which snow used to be 

 preserved through the year. 



2. Prismatic Mica. — Professor Dewey. — This mineral 

 3S found in Hinsdale in this county. It is on the edges of 

 common mica like that of Saratoga- Only three or four 

 very small fibres are often found on the edges of one of the 

 lamina. 



Alineralogical JVoticeSy ly Dr. Torrey, 



3. Green Zinc Ore ofAncram^ (Ancramite.) — All the spe- 

 cimens of this mineral which I have seen, except one in the 

 possession of Prof. Renwick, of Columbia College, have 

 evidently undergone the action of fire, so that some have 

 supposed it to be an artificial substance. The specimen of V 

 Prof, Renwick seemsj however, to remove all doubts on 

 this subject, as it has every appearance of a native mineral. 

 Several excellent mineralogists who have seen itj have pro- 

 nounced it so. This interesting ore has not yet been dis- 

 covered hi situ, although diligent search has been made for 

 n since my account of it was published. 



4. Stilbite. — A new locality of this mineral has lately 

 been discovered by Governeur Kemble, Esq. in the high- 

 lands of New- York, opposite West-Point. It occurs in a 

 decomposing cellular blueish feldspar, forming a vein in 

 gneiss, in small aggregated ciystals of a honey yellow colour. 

 The crystals are forr-sided prisms, with rectangular bases, 

 about one eighth of an inch long, with several smaller and 

 gradually diminishing cuneiform crystals applied to two op- 

 posite sides ; giving the crystals a radiated appearance, with 

 deep re-entering angles on the sides. The summits are 

 truncated at the terminal edges, slightly bevelled in the di- 

 rection of the laminae of the crystal^ which is also the case 

 with the cuneiform additions. The faces produced by 

 truncation and bevehnent are brilliant, but the sides of the 

 prism are often dull. 



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