340 



II. Soluble Mineral (B). 



Grs. Oxygen. 



1. Silica, 12-36 . . 38 -86 . . 20-175 



2. Protoxide of iron, . . . 6*28 . . 19*74 . . 4*379 ^| 



3. Lime, 0*23 . . 0-72 . . 0-204 | 



4. Magnesia, 11 72 . . 36'85 . . 14'727 V=19'465 



5. Potash, 0*07 . . 0*22 . . 0'036 | 



6. Soda, ...... 0-15 . . 0*47 . . 0'119 J 



7. Loss,. ...... 1 00 3-14 



31 -81 grs. 100-00 



This result completely verifies that already found, and proves the 

 soluble mineral of the Meteorite to be Chrysolith, having the formula 



3RO, Si0 3 , 



in which EO denotes protoxide of iron and magnesia. 



The 42*10 grs. of mineral insoluble in muriatic acid were divided 

 into equal parts, of which one was fluxed with carbonate of soda, and 

 the other with lime and chloride of ammonium, with the following 



results : — 



Grs. 



Silica, 12-45 



Alumina, 0*35 



Peroxide of iron, . . . 1 ' 64 



Oxide of manganese (M^Oi), 0*16 



Peroxide of chrome (CrgOs), 0*51 



Carbonate of lime, . . . 1*45 



Pyrophosphate of magnesia, . 12 "45 

 Potash and soda chlorides, . 0 - 80 

 Platino-chloride of potassium, 0 *90 



Assuming the chromium to be present as chrome-iron, and making 

 the necessary reductions in the other elements, we find 



Grs. 



Original weight, .... 21*05 

 Chrome-iron, 0*75 



Insoluble mineral, 20*30 grs. 



III. Insoluble Mineral. 





Grs. 





Oxygen. 





12*45 . 



. 61*33 . 



. 31*842 







0*35 . 



1-72 . 



0*803 





Protoxide of iron, . 



1*23 . 



6*06 . 



1-344 ^ 





Protoxide of manganese, 



0*16 . 



0*78 . 



0-174 







0*81 . 



3-99 . 



1-133 



11 



4*47 . 



. 22*02 . 



8-800 



> 





0-28 . 



1*38 . 



0*352 







0*17 . 



0-83 , 



0-140 





Loss, 



0*38 . 



1-89 







20 *30 grs. 100*00 



