LIME. 



217 



Fig. 60. 



Fig. 61. 



Fig. 62. 



This cavern contains masses of calcareous spar, in the forms which are usual in such loca- 

 lities. The specimens, however, are seldom so beautiful as those which are found in the 

 caverns of the county of Schoharie. 



Cayuga County. In the slate near the village of Auburn, there are 

 often found rounded masses of a dark coloured limestone, called Septaria. 

 These are crossed in various directions by veins of celestine, among 

 which minute crystals of calcareous spar are also observed. They 

 usually have the form of the scalene dodecahedron, metastatique of 

 Haiiy. Fig. 60. r on r 144° 20' 26"; r on r' 104° 28' 40"; r on r" 

 133° 26' 0". These crystals deserve to be particularly noticed, in con- 

 sequence of their association with celestine. 



Clinton County. According to Dr. Emmons, crystaUized carbonate 

 of lime occurs at the Finch ore bed. 



Dutchess County. Dark colored calcareous spar is found in the town 

 of Rhinebeck, in this county. 



Essex County. In the town of Moriah, on 

 Mill brook, near Port Henry, crystals of calca- 

 reous spar are found in veins in white lime- 

 stone. The forms which I have observed at this 

 locality are similar to Fig. 58, and to those here 

 introduced. Fig. 61 is the equiaxe, with the 

 lateral angles replaced by planes. In Fig. 62, 

 the replacing planes are still further extended, 

 forming the dodecaedre of Haiiy. c on c 120° 0'. 

 In the town of Schroon there are translucent 

 masses having a fine green tinge, from which 

 cleavages of great beauty may be obtained. 

 When held between the eye and the light, they bear a great resemblance to pearl, especially 

 if of considerable size. They sometimes contain small scales of graphite. 



In Ticonderoga, at Rogers' rock, there are often found masses made up of minute crystals 

 of calcareous spar of the primary form, with grains of yellow garnet, and small but highly 

 finished crystals of feldspar or albite. The whole are very feebly aggregated, and may be 

 easily crumbled by the fingers. According to Cleaveland, hemitrope or grouped crystals of 

 calcareous spar occur at this locality, but I have not been so fortunate as to meet with any 

 specimens. 



MiN. — Part II. 



28 



