4. It occurs at Gulsen in Upper Stiria, in serpentine ; at Hrubschiz, 

 in Moravia, with the variety Meerschaum ; at Baldifrero and Castella- 

 raonte, in Italy ; at Valeccas in Spain, and at Baumgarten in Silesia. The 

 compact variety, analyzed by Dr. HENRY, was from the East Indies. 

 The Meerschaum occurs in the Isles of Samos and Negropont, in the 

 Archipelago ; at Kiltschik in Natolia, where it is soft when first taken 

 from the locality, but hardens on exposure to the air. The pulverulent 

 variety is found in India. In the U. S. it occurs at Hoboken, (N.J.) dis- 

 seminated through. mamillary Dolomite, filling up narrow seains and 

 cavities among the concretions, in opake, closely aggregated, white 

 fibres. At the same place, also, in the pulverulent state, occupying 

 seams sometimes half an inch wide, and also in crusts coating capillary 

 crystals of Arragonite, and masses of Native Magnesia. The mine- 

 ral analyzed by WACHTMEISTER, from Hoboken, probably contained a 

 large quantity of hygrometric moisture. At Bolton, (Mass.) it is found in 

 seams, traversing white limestone, in delicate, scarcely perceptibly 

 fibrous, masses. 



5. Magnesite is employed in porcelain manufactories. The meers- 

 chaum is made into pipes, and in Turkey is used for the same purposes 

 as Fuller's earth. 



6. The crystals of Magnesite, quoted by some writers, appear to be- 

 long to the species Rhomb Spar. So far as its properties are known, its 

 place in the natural arrangement would be either within the genus 

 Lime Haloide, where it is here placed, or it would form a new genus, 

 next, preceding or following this genus. 



