192 PHYSIOGRAPHY. 



Spathic Iron. 



gneiss for the distance of a mile. A bed of it also exists at Plymouth, 

 (Vt.) It is found in small quantity at Lane's mine in Monroe, (Conn.) 



APPENDIX TO SPATHIC IRON. 

 i. Kaminoxene Carbon- Spar. BREITHAUPT. 



P on P = 107. 



Cleavage, perfect parallel with P, traces parallel with o. 

 Hardness (scale of BREITHAUPT) = 5. Sp. gr. = 3-765. 

 1. It appears that 1 p. c. of oxide of manganese is essential to the pres- 

 ent species. To it belongs the white Sparry-iron from Vorgtlande, from 

 Bayreuth, and from Siegen in Prussia. 



ii. Olizone Carbon-Spar. BREITHAUPT. 



Pon P = 107 3'. 



Cleavage, parallel with P perfect. 



Hardness (scale of BREITHAUPT) = 5-0 . . . 5-25. 



Sp. gr. = 3-7453, from Ehrenfriedersdorf. 



Analysis. 

 By MAGNUS. 



Carbonate of iron - - - - - 59-99 

 Carbonate of manganese ----- 40-66 



iii. Mlotropose Carbon-Spar. BREITHAUPT. 

 Pon P = 107o H/. 

 Cleavage, parallel with P perfect. 

 Hardness (scale of BREITHAUPT) = 5-25 . . . 5-50. 

 Sp. gr. = 2 992, from Hall in Tyrol. 



= 3-001, a liver-brown variety. * 



Analysis. 

 By STROMEYER. 



Carbonate of magnesia - 89-70 



Carbonate of iron 8-02 



Carbonate of manganese - 2-44 



iv. Mesitine Carbon- Spar. BREITHAUPT. 

 PonP=107 14'. 



Cleavage, parallel with P very perfect; traces parallel with o. 

 Color dark greyish and yellowish grey. Transparent and trans- 

 lucent. 



Hardness (scale of BREITHAUPT) = 5-00. 



