264 MEMOIRS NATIONAL ACADEMY OF SCIENCES, VOL. XIII. 



Kentucky. There is nothing known with reference to the time of its fall. It came into my possession shortly after 

 its discovery. It was entire and weighed 112 pounds. Its extreme dimensions were: Length 20, breadth 10.75, and 

 thickness 6.5 inches; its shape was elongated and flattened. Its specific gravity is 7.89, and an analysis furnished: 



Fe Ni Co Cu P 



91.21 7.81 0.35 trace 0.04 =99.10 



Cohen n has given a further account of the meteorite, as follows: 



Reichenbach 3 noted bronze-colored iron sulphide and Eisenglas; Rose/ very fine Widmannstatten figures. 



Meunier £ > 8 regarded La Grange as a characteristic example of the occurrence of plessite, and used the iron accord- 

 ing to his method (heating filings on a glass plate and noting the colors) to isolate kamacite, taenite, and plessite. The 

 method can not, however, yield a serviceable result generally regarding the intimate structure of a meteorite, and cer- 

 tainly can not here on account of the fineness of structure. Later, 9 he stated that La Grange and Jewell Hill consisted 

 of equal portions of taenite and plessite and combined both together with Bvickeberg in his Jewellite group. 



The lamellae are long, straight, considerably compacted, and about 0.15 mm. broad. A peculiar fibrous appear- 

 ance and a somewhat silken, oriented luster are characteristic of the kamacite. This luster is sometimes explained 

 by the fact that the abundant hatching frequently runs parallel to the bands or intersects them at acute angles; but 

 the same luster shows itself where this is not the case, and may there be caused by a large number of closely com- 

 pacted etching pits, which, however, do not become visible except under considerable magnification. The few small 

 fields are filled with dark plessite, which, under the microscope, appear rich in tiny, glistening, uniformly distributed 

 spangles. In the quite numerous, larger areas the structure of the iron as a whole is repeated. Since the lamellae are 

 but slightly smaller here than the principal lamellae and the taenite scarcely appears, these large fields do not show up 

 prominently, and the etching surface has an unusually peculiar appearance. 



Minor constituents appear to be scarce and of small size. Schreibersite was observed only in a few particles 2 

 mm. in size. In a specimen in the Vienna collection the troilite is distinguished by an abundance of daubre'elite 

 bands, of which as many as four occur in one crystal of 0.75 mm. in thickness and 6 mm. in length. In the other 

 sections examined daubr^elite is wanting entirely, so that its distribution, as usual, is very irregular. Recently, 

 Brezina 10 made mention of Reichenbach lamellae with bent borders, which show faulting. In the neighborhood of 

 the natural surface a little Eisenglas occurs. Meandering cracks, frequently intersecting the lamellae, spread out 

 quite extensively in the interior. 



Analysis by Burger: 



Fe Ni Co Cu Cr P S 



91.92 7.61 0.62 0.01 0.02 0.03 0.02 =100.23 



The meteorite is distributed, but the largest quantity, 85 pounds, is in the Amherst 

 collection. 



BIBLIOGRAPHY. 



1. 1861: Smith. Two new meteorites. Amer. Journ. Sci., 2d ser., vol. 31, p. 151. 



2. 1861: Smith. Description of three new meteorites. — Idem, pp. 265-266. 



3. 1862: von Reichenbach. No. 20, p. 622; No. 21, p. 588. 



4. 1863: Rose. Meteoriten, pp. 65 and 153. 



5. 1869: Meunier. Recherches. Ann. Chim. Phys., 4th ser., vol. 17, pp. 29 and 35. 



6. 1884: Meunier. Meteorites, p. 47. 



7. 1885: Brezina. Wiener Sammlung, pp. 208-209 and 233. 



8. 1887: Brezina and Cohen. Photographien, pis. 20 and 21. 



9. 1893: Meunier. Revision des fers meteoriques, pp. 37 and 38. 



10. 1904: Brezina. The arrangement of collections of meteorites. Proc. Amer. Philos. Soc, vol. 43, No. 176, p. 230. 



11. 1905: Cohen. Meteoritenkunde, Heft 3, pp. 356-358. 



La Grange, 1878. See Bluff. 



LANCASTER COUNTY. 



Nebraska. 



Iron. 



Weight, 13 kgs. (29 lbs.). 



The only mention of this meteorite is by Barbour, 1 who speaks simply of having received 



such a meteorite. 



bibliography. 



I. 1903: Barbour. Report Nebraska Geol. Survey, vol. 1, p. 184. 



