The Rev. S. Haughton's Notes on Mineralogy. 263 



1. Primary Analysis of Meteorite (A)." 



Per cent. 



1. Metallic iron 19*57 



2. Metallic nickel 0-94 



3. Magnetic pyrites 4*05 



4. Mineral soluble in dilute muriatic acid . 33*34 



5. Mineral insoluble 42*10 



100*00 



The analysis of the earthy mineral soluble in dilute muriatic 

 acid gives us (considering that 4*05 per cent, of FeS is equiva- 

 lent to 3*68 per cent, of Fe 2 3 ) the following result : — 



2. Soluble Mineral (A). 



grs. Per cent. Oxygen. 



1. Silica 12*92 38*74 20*112 



2. Alumina 0*15 0*45 0*209 



3. Protoxide of iron . . . 5*51 16*55 3*671 



4. Protoxide of manganese . 0*05 0*15 0*033 



5. Lime 028 0*84 0*340 



6. Magnesia 13*65 40*93 16*358 



7. Potash ...... 0*08 0*24 0*039 



8. Soda 0*17 0*51 0*130 



9. Loss 0*53 1*59 



33*34 10000 40*892 



Adding together the oxygen of the protoxides, we find — 



RO . . . =20*571 



SiO 3 . . . =20*1121 _ 2n . 91 



A1 2 3 . . = 0*209/ —^ u ^ i * 



This result identifies the soluble mineral with Chrysolith (or oli- 

 vine), unless it be supposed to be a mixture of several minerals. 

 Neglecting all the lesser constituents, we have — 



Oxygen. 

 SiO 3 . . . 20*112 



FeO'. . . 3*6711 



MgO. . . 16*358 J ^w> 



which gives very well the formula of Chrysolith, 



3RO, SiO 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 



