G. P. Merrill — Minor Constituents of Meteorites. 519 



The metallic portion yielded : 



Silicon 0-129$ 



Sulphur trace 



Phosphorus 0*07 1 



Nickel 9-207 



Cobalt _ 0-507 



Copper _ _ 0-040 



Chromium _ . 0-160 



Carbon 0-088 



Manganese 0*080 



Iron _ 89-700 



99-982 



with no traces of tungsten, vanadium or molybdenum. The 

 silicate portion yielded : 



Silica (SiO a ) 47*36$ 



Alumina (A1 2 3 ) _ 5-67 



Ferric oxide (Fe 2 3 ) 0-10 



Ferrous oxide (FeO)___ 11-25 



Iron (Fe) 0-84 



Magnesia (MgO) 31-72 



Manganous oxide (MnO) 0-36 



Soda (Na 2 0) ., 2'42 



Potash (K 2 0)_. 0-23 



Titanium (Ti) . _ _ _. none 



99-95$ 



Combining the metallic and non-metallic portions and recal- 

 culating with the usual assumption that the mineral called 

 troilite is the monosulphide FeS, and that the schreibersite 

 conforms to the formula Fe 2 NiP, the following figures are 

 obtained representative of the composition of the stone as a 

 whole : 



Silica (Si0 2 ) 35-300$ 



Alumina (A1 2 3 ) 4-24 



Ferric oxide (Fe 2 3 ) 0-75 



Ferrous oxide (FeO) 8*38 



Lime (CaO) .... .__ _.. 0-62 



Magnesia (MgO) 23*631 



Manganous oxide (MnO) 0*268 



Soda(Na 2 0)._ 1*804 



Potash (K 2 0) 0*171 



Sulphur (S) _ . 2-184 



Phosphorus (P) 0*0138 



Nickel (Ni) . _ 1-80 



