﻿228 Dana and Penfield — Undescribed Meteoric Stones. 



marked brecciated character. To the bronzite also are to be 

 referred occasional large spherules having a coarsely fibrous or 

 columnar structure, the fibers lying in several directions within 

 the limits of the same individual. 



Plagioclase feldspar seems to be sparingly present in crystal- 

 line fragments, showing distinct, though not sharp, twinning 

 structure. Especial interest attaches to this constituent of the 

 stone because it shows most clearly the brecciated character 

 just alluded to. One piece for example has been broken trans- 

 versely a number of times and then cemented by the ground- 

 mass so that it still preserves in general its original outlines 

 though made up of separate sections. This feldspar is rich in 

 black inclusions lying parallel to the twinning lines. A num- 

 ber of patches of an isotropic mineral, which is probably to be 

 referred to maskelynite, were also observed. 



The specific gravity of this meteorite was found to be 3*66. 

 A careful chemical analysis (Penfield), gave the following 

 results. It was divided in the first place into the nickeliferous 

 iron 17*16 per cent and the mineral part including the troilite 

 and silicates 82 '84 per cent. 



The analysis of the iron yielded : 



Fe 91-32 



Ni 8-04 



Co 0-60 



Cu 0-04 





100-00 



The mineral portion was divided into: 



Soluble in 



wni j Troilite Fe (Ni) S 

 1101 \ Silicates 



6-70 with NiS=0-62 



48-85 



Insoluble in 



HC1 including chromite 



43-97 



Water 





1-14 





100-66 



The analyses of the soluble and 



insoluble portions ga^ 



further : — 









Soluble in HC1. 



Insoluble in HC1. 



Si0 2 



19*70 40-33 



24-11 54-83 



A1 2 3 



0-25 0-51 



2-12 4-82 



FeO 



10'42 21-33 



3-80 8-64 



MgO 



17-17 35-15 



10*80 24-56 



CaO 



0-81 1*66 



1-47 3-34 



Na 2 



0-16 0-33 



0-87 1-98 



k 2 6 



0-02 0-04 



0-05 0-12 



p 3 o 6 



0-32 0-65 



„ 



Chromite 







0-75 1-71 



48-85 100-00 43-97 100*00 



