METEORITES OF NORTH AMERICA. 353 



A chemical analysis was made as follows: 



The metallic portion, by attrition and with the magnet, was freed from the stony matrix. The mass consisted 

 by weight of: Metallic portion (30.89 per cent), stony portion (69.11 per cent). 

 The metallic portion contained 



Fe Ni 



90. 94 9. 00 =99. 94 

 The stony part contained 



Silica 36. 61 



Sulphur 3. 45 



Lime 2. 25 



Magnesia 15. 09 



Phosphorus 0. 25 



Iron (combined) with a little AL,O, 12. 15 



68.80 



While this analysis is not complete, it serves to show the matrix to consist (besides the pyrites) of silicates. The 

 metallic portion is the usual nickel iron combination of which Caille is perhaps the best type. The silicates, besides 

 olivine, seem to have iron as the chief basic constituent. 



Brezina 2 classed the meteorite as a veined crystalline chondrite, and remarked concerning 

 it as follows: 



Has a coarse interrupted crust not very different from the rest of the dark mass. Shows an emphatically crystal- 

 line structure with a fine metallic vein of the form of a folia bent at an obtuse angle. 



The meteorite is distributed, with the largest quantity (3,965 grams) in the Ward-Coonley 

 collection. 



BIBLIOGRAPHY. 



1. 1888-1889: LEDOUX. The Pipe Creek Meteorite. Trans. New York Acad. Sci., VoL 8, pp. 186-187 (Analysis). 



2. 1895: BREZINA. Wiener Sammlung, p. 261. 



PITTSBURGH. 



Allegheny County, Pennsylvania. 



Here also Millers Run. 



Latitude 40 30 / N., longitude 80 (K W. 



Iron. Coarsest octahedrite (Ogg), of Brezina. 



Found about 1850. 



Weight, 132 kgs. (292 Ibs), mostly wrought up. 



The first mention of this meteorite was by Silliman, 1 as follows: 



The second mass of iron noticed by Professor Silliman was found in the State of Pennsylvania, near the city of 

 Pittsburgh. The attention of Professor Silliman was called to this mass by Mr. George Weyman, a student in the 

 analytical laboratory of Yale College, and through him all the details of its history have been obtained which can now 

 be hoped for from Mr. John H. Bailey, of Pittsburgh. Professor Silliman then read extracts from a letter from Mr. 

 Bailey, dated June, 1850, from which it appears that this mass of meteoric iron was found in a field upon Millers Run, 

 in Allegheny County, Pennsylvania, near Pittsburgh. A farmer was ploughing in the field, where, seeing a snake, 

 he seized a stone, as he supposed, to destroy the animal, but, finding it remarkably heavy, he was attracted, after com- 

 pleting his purpose, to examine the body which possessed such remarkable weight. It was carried to Pittsburgh, 

 where it wao found to be very malleable, and unfortunately wrought into a bar, which has since been lost sight of. 

 The mass was of an ovoidal figure, almost 6 or 7 inches in diameter, and weighed nearly 292 pounds. It is greatly to 

 be regretted that only a very small portion of this large mass has been preserved. A qualitative examination of it 

 has shown that it is rich in nickel, and possesses only a very inconsiderable portion insoluble in acids. Professor Silli- 

 man stated that he would present a complete analysis of the mass when he had received the portion still remaining, 

 which is now on its way from Mr. Bailey. 



Shepard 2 gave the specific gravity as 7.380. 



Reichenbach s included it among the irons with Widmanstatten figures showing a beau- 

 tiful development of tsenite and glanzeisen. 

 716 15 23 



