176 



Miscellanies. 



protoxide of iron, mixed with silicates of potash, lime and alumina, 

 in which the silica contains twice as much oxygen as the bases 

 0.75 chromate of oxide of iron mixed with oxide of tin. These 

 proportions are subject to some variations in different portions of the 

 stone. 100 parts of the meteoric iron, contain 



Iron , 

 Nickel, 



Cobalt, 



Tin and copper, 



Sulphur, . 



A trace of phosphorus. 



93.816 

 5.053 

 0.347 

 0.460 

 0.324 







Silica, . 

 Magnesia, 



Protoxide of iron, • 

 Oxide of manganese, 

 Oxide of nickel, containing tin an 

 Alumina, 

 Soda, . . 

 Potash, .... 

 Loss, principally sulphur, . 

 The insoluble part contains, 

 Silica, .... 

 Magnesia, 

 Lime, . 

 Protoxide of iron, 

 Oxide of manganese, 



Oxide of nickel, containing tin an 

 Alumina, 



Soda, . • 



Potash, .... 



Chromate of iron, containing tin, 

 Loss, 



d copper, 





a 



copper 



33.084 

 36.143 

 29.935 

 0.465 

 0.465 

 0.329 

 0.857 

 0.429 

 1.273 



57.145 

 21.843 

 3.106 

 8.592 

 0.724 

 0.021 

 5.590 

 0.931 

 0.010 

 1.533 

 0.505 



f 



The remaining or stony portion of the mass, is partly soluble in 

 hydrochloric acid. The soluble part consists of, 



Pogg. Annalen. — Lon. and Ed. Phil Mag. Feb. 1835. 



21. Carrara marble. (O.P.H.)— It appears by the recently pub- 

 lished account of this marble, by Professor Hoffman, "that this pure 

 saccharine limestone, in which no trace of organic matter has been 

 discovered, although in its cavities are occasionally found crystals of 

 quartz, is only transformed oolite" A very wide expanse of ser- 



