170 MEMOIRS NATIONAL ACADEMY OF SCIENCES, VOL. XIII. 



In his 1S85 catalogue, Brezina 3 grouped Duel Hill in the Arva group of coarse octahe- 

 drites. These are described as having 



lamellse long and abundant, grouped, generally weakly hatched and granulated, with strong oriented sheen; most of 

 the bands containing inclusions of porous schreibersite. Breadth of the bands, 1.2 to 2.5 mm., mostly 1.5 mm. 



Brezina says further: 



These irons, which belong to the most beautiful iron meteorites, show characters peculiar to themselves. Owing 

 to the generally strongly oriented sheen, in combination with evident grouping of the lamellae in certain portions, 

 large areas appear dark and others light, an appearance noted by Haidinger. The breadth of the bands in one iron 

 (Duel Hill) falls so low that it belongs among irons with medium lamellfe. On the other hand, I have foreborne to 

 subdivide the group because the appearance of all the irons of this group is so similar, and for the further reason that 

 the plates of Duel Hill which I have examined are not large enough to allow a conclusion as to the whole of an iron 

 whose structure changes so rapidly. 



Further he states: 



Duel Hill and Caryfort are intermediate between [coarse and medium octahedrites]. They have oriented sheen, 

 hatching not prominent, hence kamacite strongly granulated in the former. 



Genth and Kerr 4 simply repeat the statements of Burton. Fletcher 5 includes Duel HU1 

 under Jewell Hill and says that the two irons probably belong to one fall. 



Venable, 6 in his catalogue of North Carolina meteorites, under the title of "Madison 

 Meteorites," gives Duel Hill as the locality and states: 



There are several meteoric masses attributed to Duel Hill and to Jewel Hill, Madison County. The similarity of 

 these names in pronunciation and apparent confusion between them led to inquiry as to their exact location. The 

 result of the inquiry is that at present no Jewel Hill is known in this county. There was a Jewel Hill, at one time the 

 county seat, but its name was changed to Duel Hill and the county seat removed to Marshall. These two are therefore 

 one and the same locality. 



Venable lists three masses from this locality. One, he states — 

 was found in 1856 and is recorded as preserved in the Amherst collection. It weighed 40 pounds. No analysis has 

 been found. Amherst has two pieces, one of 600 grams and one of 167.5 grams. 



The next one is the 8 pound mass described by Smith (see Jewell Hill) , and the next the 

 mass here described. 



Brezina, 9 in 1895, objected to the uniting of the masses of Jewell Hill and Duel Hill by 

 Fletcher, on account of their great differences in structure and composition. Their difference 

 in structure he illustrates by two plates. Further he says: 



Duel Hill is distinguished by the appearance of large troilite cylinders lying parallel to one another; in a com- 

 plete transverse section in the Vienna collection is one 15 cm. in length by 1 to 1.8 cm. in thickness which is inclosed 

 throughout its entire length in a covering of schreibersite and upon one end to within 2.5 cm. from the edge is 

 enveloped in limonite; a second troilite cylinder, 3 cm. thick, has fallen away except for a few traces. The illustra- 

 tion shows the structure very distinctly, the prominent, dark, compact ribs of cohenite being very regularly disposed 

 in the kamacite or absent altogether. 



Cohen 7 remarks the occurrence of cohenite in the meteorite and notes 8 that it takes on a 

 more or less strong permanent magnetism. 



In the separation of Duel Hill, most later authorities agree with Brezina. Apparently, 

 two falls took place upon the same hill within a mile of each other. One was a fine, the other 

 a coarse, octahedrite. Of the fine octahedrite, there were two masses, probably, since the 

 Amherst specimens are fine octahedrites. A further account of the history of the meteorite is 

 given under Jewell Hill. 



Only 1,510 grams of Duel Hill are listed in collections, Vienna possessing the largest piece. 

 As remarked by Cohen, 11 however, the catalogues do not always distinguish between Duel Hill 

 and Jewell Hill. 



BIBLIOGRAPHY. 



1. 1876: Burton. Notice of a meteorite from Madison County, North Carolina. Amer. Journ. Sci., 3d ser., vol. 



12, p. 439. (Analysis.) 



2. 1881: Brezina. Bericht III. Sitzber. Wien. Akad., Bd. 84 I, pp. 279-280. 



3. 1885: Brezina. Wiener Sammlung, pp. 215, 216, and 234. 



4. 1885: Genth and Kerr. The minerals and mineral localities of North Carolina, p. 14. (Printed at Raleigh.) 



5. 1888: Fletcher. Introduction, p. 60. 



