E. E. Howell — Beaver Creek Meteorite. 



433 



with dilute hydrochloric acid on the water bath, filtering, sepa- 

 rating gelatinized silica by dilute solution of potassium hy- 

 droxide, and repeating the treatment of the residue with acid 

 and alkali. In this way there was decomposed 51*11 per cent 

 of the whole. The composition of both soluble and insoluble 

 parts as actually found by analysis is as follows, the S and. P 2 5 

 being taken from the previous analysis, as also the water of 

 the soluble part after allowing for the trifle belonging to the 

 insoluble portion. 



•73 chromite. 



Soluble 



porti 



311, 51-11 



per cent. 



Insoluble portion 



s 



Fe _ _ . _ 









2-21 ) 



. 3*87 \ 



6'08 troilite. 



FeO .. 









... *01 i 



~, i • -23 



o 2 o 3 . 









•03 j 



•04 chromite __ 

 •50 



SiO„ .. 









. 17*03 



27-74 



TiO, -: 











•09 



Al O . 









•25 

 . 8-69 



2*34 



FeO .. 









3-85 



mo... 









•04 



trace 



MnO . . 









•12 



•17 



CaO .. 









•46 



1-65 



MgO . _ 









. 17-24 



11-14 



K 2 .. 









•01 



•12 



Na 2 . 









•06 



•90 



H O above 



100° 



c. 



•31 



•03 



PoO, -- 









•30 

 trace 





2 5 



Cl..__ 











Loss -. 









•48 



•13 



51-11 48-89 



Excluding troilite and chromite, but including phosphate, 

 the percentage composition of the soluble and insoluble mix- 

 tures is as follows : 



Soluble portion. Insoluble portion. 



SiO„. 38-26 57-75 



TiO" 2 -18 



A1 2 3 -56 4-89 



FeO 19-52 8-02 



NiO -09 trace 



MnO - -27 -35 



CaO 1-03 3-44 



MgO.. 38*73 23-19 



K 2 -02 -25 



Na 2 -13 1-87 



H 2 above 100° C -70 -06 



P 2 5 -68 



CI trace 



99-99 



100-00 



