339 



Adding together the oxygen of the protoxides, we find 



RO = 20-571 



Si0 3 = 20-112 \_ 9n .o 91 



A1 2 0 3 = 0-209 ) ~ JU 6Zi 



This result identifies the soluble mineral with Chrj^solith (or Olivine), 

 unless it be supposed to be a mixture of several minerals. Neglecting 

 all the lesser constituents, we have 



Oxygen. 



Si0 3 , . . 20*1 



FeO, . . 3'67n 20 . 039 



MgO, . . 16-358/ Z0 Udy 



which gives very well the formula of Chrysolith, 



3RO, Si0 3 - 



The preceding analysis of the soluble portion of the Meteorite was 

 checked by the following proceeding: — The 100 grs., from which the 

 sulphur was determined, having been acted on by the muriatic acid, the 

 acid solution was evaporated to dryness, and filtered ; and the portion 

 left on the filter was boiled with solution of carbonate of soda, so as to 

 redissolve the silica soluble in muriatic acid. There were left 42*44 grs. 

 of insoluble mineral, while the soluble portion gave 



Grs. 



Silica, 12-36 



-r, ., c . OD „ A (Present originally as iron, protoxide 



Peroxide of iron, . . . . 38*60 | of ^ pro ^sulphuret " 0 f iron, 



Oxide of nickel, . . . . 1*44 

 Carbonate of lime, . . . . 0*40 

 Pyrophosphate of magnesia, . 32*62 

 Potash and soda chlorides, . 0*40 



Assuming the iron (metallic) as 19*57, and the protosulphuret of 

 iron as 4*05, we find 



Equivalent of 19*57 Fe, .... 27*94 Fe 2 0 3 

 „ 4-05 FeS, .... 3-68 „ „ 



31-62 



Subtracting this result from the total peroxide of iron, and converting 

 the oxide of nickel into nickel, we obtain 



I. Primary Analysis of Meteorite (B). 



1. Metallic iron, 19-57 



2. Metallic nickel, '.. 1*13 



3. Magnetic pyrites, 4*05 



4. Mineral soluble, . ......... 32 -.81 



5. Mineral insoluble, ......... 42 -44 



100 00 



