PART OF NEW YORK, 189 



mellar ; grains, less than in the preceding variety : 

 this is not abundant. 



Tabular Spar. 



This is found interspersed in small beds, in the 

 bed of Garnet resiuite, with which it is more or less 

 intimately mixed. Colour, pure and greyish- white ; 

 by exposure to the air, it becomes more opaque, than 

 when first taken from the bed ; lustre, pearly : the 

 tables are semi-transparent : it occurs in tables con-v 

 fusedly intermixed ; a few of which have a tendency 

 to the hexagonal form ; this was noticed by Karsten 

 in some of the European specimens of this mineral: 

 the tables are longitudinally striated. It possesses 

 a double cleavage, parallel to the sides of a slightly 

 rhomboidal prism, its angles by the common gonio- 

 meter are 93° and 87° \ longitudinal fracture fibrous; 

 transverse, uneven : scratches glass : moderately* 

 frangible : structure, crystalline : specific gravity 

 2. 98. Phosphoresces by friction and heat. 



Augite. First Variety. 



This accompanies the Garnet resinite and Tabu- 

 lar Spar, among which it is sparingly interspersed, 

 in grains, of about the size of a small pin's head. 

 As the term, Coccolite, has been applied to granular 

 Pyroxene, it is probable, that this mineral ought to 

 be classed under that name. Its colour in the grains 

 is emerald green^ in powder, greenish white : exter- 



