HANDBOOK OF THE METEORITE COLLECTIONS. 47 



From this the mineral composition was calculated as: 



Per cent. 



Nickel-iron 7. 14 



Troilite 5. 44 



Phosphor-nickel-iron . 90 



Chromite . 87 



Silicates 85. 47 



99.82 



The silicate material yielded, on analysis, results as follows : 



Per cent. 



Silica (SiO^) 48.15 



Alumina (AI2O3) 2.98 



Ferrous oxide (FeO) 14.75 



Manganous oxide (MnO) .14 



Lime (CaO) 2.13 



Magnesia (MgO) 30.13 



Potash (K2O) .37 



Soda (Na20) 1.45 



100. 10 



the silicates being enstatite, augite, anorthite, olivine, maskelynite( ?), 

 and glass. 



The structure is, as above noted, strongly chondritic, the chon- 

 drules being exceptionally variable in composition, the following forms 

 being noted: (1) Anorthite chondrules; (2) olivine chondrules, 

 both monosomatic and polysomatic; (3) glass chondrules with por- 

 phyritic olivine inclusion ; (4) ,oli vine-pyroxene chondrules; and (5) 

 pyroxene chondrules. The structure, as a whole, is that of a frag- 

 mental rock, and it is so regarded by Messrs. W. Ramsay and L. H. 

 Borgstrom, who have studied it. 



Reference. — W. Ramsay and L. H. Borgstrom, Bull. Comm. geol. 

 Finlande, No. 12, 1902. 



BLUFF, FAYETTE COUNTY, TEXAS. Nos. 135, 240, 344. 



Stone, Ckb. Three fragments of first find (1878), weighing 137 

 grams, 110 grams, and 6,363 grams, showing crust; one Avith black 

 vein as figured in American Journal of Science (vol. 36, 1888, p. 118). 

 One fragment found in 1901, weighing 3,136 grams, with one polished 

 surface; other surfaces weathered. Date of fall unknown. Weight 

 of mass found in 1878, 146,000 grams; chemical analyses by Whit- 

 field yielded results as follows: 



