170 BULLETIN 94, UNITED STATES NATIONAL MUSEUM, 



Stone is of interest in being the first recorded and described meteoric 

 stone to fall in America. 



Reference. — B. Silliman and J. L. Kingsley, Trans. Amer. Philos. 

 Soc, vol. 6, 1809, p. 323. 



WICHITA COUNTY (BRAZOS RIVER), TEXAS. Nos. 20, 348. 



Iror, Og. Two slices, one 4 by 1 by 0.7 cm., weighing 20.8 grams, 

 and one, 5 by 5 cm., weighing 143 grams. Date of fall uncertain ; 

 first known in 183G. Original weight unknown, but not far from 

 160 kilograms, as given by Mallet. Analysis by this authority 

 yielded : 



Per cent. 



Iron (Fe) 90. 7G9 



Nickel (Ni) 8. .342 



Cobalt (Co) .2G5 



Manganese (iMn) Trace. 



Copper (Cu) .018 



Tin (Sn) .004 



Phosphorus (P) .141 



Sulphur (S) .016 



Graphitie carbon (C) .190 



Silica (Si02) \ 132 



Magnetic ii'on oxidel 



99. 877 



Specific gravity at 24° C, 7.841. 



It has been suggested that this iron may have been a part of the 

 same fall as the Ked River or Cross Timbers mass found about 1808. 



References. — B. F. Shumard, Trans. St. Louis Acad. Sci., vol. 1, 

 185G-60, p. 622. J. W. Mallet, Amer. Journ. Sci., vol. 28, 1884, p. 285. 



WILLAMETTE, CLACKAMAS COUNTY, OREGON. No. 500. 



Iron, Om. An irregular slice 23 by 30 cm. in greatest diameter, 

 weighing 1,954 grams, from the gigantic mass weighing 31,107 

 pounds, found in the autumn of 1902, and now in the American 

 Museum of Natural History in New York. It is the third largest 

 mass known. Its chemical composition as shown by Davison's 

 analysis is: 



Per cent. 



Iron (Fe) 91.65 



Nickel (Ni) 7.88 



Cobalt (Co) .21 



Phosphorus (P) .09 



99.83 



Gift of C. S. Bement. (PI. 36, fig. 1.) 



References.— \\. L. Ward, Pioc. liochester Acad. Sci., vol. 4, 1904, 

 p. 137. E. O. Hovey, Amer. Mus. Journ., vol. 0, No. 3, July, 1906, 

 p. 105. 



