280 Notice of some Recent [April 



Silica 39-56 



Protoxide of iron 13*83 > iq.qq 

 Peroxide of iron 5*00 5 



Alumina 2*70 



Oxide of chromium . . 0*50 



Lime 1-86 



Magnesia ..... 26-30 



Oxide of Nickel . . . 0*10 



Oxide of manganese . 2-40 



Potash 2-08 



Soda 1-20 



(Kongl. Vetensk. Acad. Hand. 1828, 156.) 95*53 



H. Stromeyer examined a mass found at Magdebourg in 

 1831, the specific gravity of which which was 7*39, and its 



constituents, Iron - - - 74-65 



Molybdenum 10*19 



Copper - - 4-32 



Cobalt - - 3-07 



Nickel - - 1*23 



Manganese 0*01 



Arsenic - - 2*47 



Phosphorus 2-27 



Sulphur- - -92 



Silicon - - -39 



Carbon - - -48 



10-000 

 Another body found near the Iron Works of Rothehutte, 



in the Hartz, afforded, Iron - - 81*14 



Molybdenum 1*08 



Copper - - 7-69 

 Cobalt - 

 Nickel - 



Manganese- 0*14 



Arsenic - - 1*82 



Phosphorus -81 



Sulphur - - -62 



Silicon - - 1*94 



Carbon - - -69 



Calcium - -29 



(Ann. des Mines, v. 568.) 98*62 



\ 2-40 



