350 Analysis of ' Scientific Books and Memoirs. 



2. Prismatoidal Manganese Ore or Manganite consists of 



Protoxide of manganese, - - 80.92 



Oxygen, 8.98 



Water, 10.10 



100.00 



3. Brachytypous Manganese Ore or Braunife consists of 



Protoxide, - 86.94 



Oxygen, --- 9.851 



Water, - 0.949 



Baryta, - 2.260 



Silica, a trace 



100.00 

 4. Pyramidal Manganese Ore or Hausmannite consists of 

 Red oxide, - 98.098 



Oxygen, - - - 0.215 



Water, - 0.435 



Baryta, - - - 0.111 



Silica, - - - 0.337 



100.00 

 5. Uncleavable Manganese Ore or Psibmelane consists of 

 Red oxide, - 69.795 



Oxygen, - 7.364 



Baryta, - 16.365 



Silica, - 0.260 



Water, - - - 6.216 



100.000 



6. Prismatic Manganese Ore or Pyrolusite consists of 



Red oxide, - 



Oxygen, . - - 



Water, - 



Silica, - 



Baryta, - 



Lime, - 



100.000 



7. Manganese Oxide noir Barytifere of Hauy, from Romaneche.— Its 

 specific gravity is 4.365. It consists of 



Red oxide, - 70.967 



Oxygen, - - - 7.260 



Baryta 



16.690 



Silica, 0.953 



Water, - 4.130 



100.000 



