1'IIYSIOGRAPHY. 



able. Fracture flat conchoidal, sometimes fine 

 earthy. 



Dull. Colour yellowish-grey, cream-yellow, yel- 

 lowish- and greyish-white. Streak white. Feeb- 

 ly translucent on the edges ...opake. 



Not very brittle. Semi-hard in a moderate degree 

 (between 3-0 and 4-0). Compound varieties are 

 often very tough ; it has been observed that 

 some of them give sparks with steel, and yet do 

 not scratch the octahedral Fluor-haloide. Sp. 

 Gr. = 2-808, BREITHAUPT. 



Adheres pretty strongly to the tongue. 



It is infusible before the blowpipe. It is dissolved with a 

 slow effervescence in the nitric and dilute sulphuric acids. 

 According to LAMPADIUS and KLAPROTH, it consists of 



From Moravia. From Stiria. 

 Magnesia 47-00 48-00. 



Carbonic Acid 51-00 49-00. 



Water 1-60 3-00. 



It occurs at Hrubschitz in Moravia, in the Gulsen moun- 

 tain in Stiria, at Baumgarten in Silesia, at Baudissero in 

 Piedmont, in Spain, and in other countries. The Magne- 

 sian Marble of Mr NUTTAL, from Hoboken in New Jersey, 

 which has been found both massive and crystallised in six- 

 sided prisms, seems to possess some analogy with Magnesite. 



MANGANESE-SPAR. 

 SPAR. 



Manganese-Spar. JAM. Syst. Vol. II. p. 445. Man. p. 325. 

 Siliciferous Oxide of Manganese. PHILL. p. 245. 



Prismatic. Cleavage apparent in two directions 

 perpendicular to each other, less distinct in two 



