326 MEMOIRS NATIONAL ACADEMY OF SCIENCES, VOL. XIII. 



Meunier 5 gave Chilton's analysis in percentage form as follows: 



Nonmagnetic portion. 



Si0 2 MgO CaO Fe 2 3 NiO A1 2 3 S 



59. G 10.4 7.8 24.6 3.2 0.2 5.08 =104.88 



Magnetic portion. 



Si0 2 , MgO, and CaO Fe Ni 



13.84 96.00 5.00 =114.84 



He also gives the specific gravity, according to Rumler,»as 3.6062. 



Brezina 6 in 1S85 classed the meteorite as a gray chondrite. In 1895 7 he removed it from 

 this class and placed it with the spherical chondrites. He states: 



The Vienna specimen shows an inclination toward Cc; the two pieces in the Tubingen collection, of 100 and 82 

 grams weight both with crust, show a decided spherical chondritic structure with slaglike crust up to 2.5 mm. in 

 thickness. 



The meteorite is distributed, Yale possessing 897 grams, Vienna 351 grams. 



BIBLIOGRAPHY. 



1. 1825: Carver. Notice of a meteoric stone which fell at Nanjemoy, Maryland, February 10, 1825. Amer. Journ. 



Sci., 1st ser., vol. 9, pp. 351-353. 



2. 1826: Chilton and Silliman. Analysis of the Maryland aerolite. Amer. Journ. Sci., 1st ser., vol. 10, pp. 131- 



135. — Additional notice of the physical characters of the Maryland aerolite (by Silliman) in the same vojume, 

 pp. 135-137. 



3. 1843: Partsch. Meteoriten, pp. 63-64. 



4. 1848: Shepard. Report on meteorites. Amer. Journ. Sci., 2d ser., vol. 6, p. 406. 



5. 1884: Meunier. Meteorites, pp. 80, 208, and 215. 



6. 1885: Brezina. Wiener Sammlung, pp. 182 and 232. 

 7 1895: Brezina. Wiener Sammlung, pp. 249 and 255. 



Nash County. See Castalia. 

 , Nashville. See Drake Creek. 



Nebraska. See Fort Pierre. 



NELSON COONTY. 



Nelson Coimty, Kentucky. 



Latitude 37° 50' N., longitude 85° 25' W. 



Iron. Coarsest octahedrite (Ogg), of Brezina; Nelsonite (type 5), of Meunier. 



Found 1856; described 1860. 



Weight, 73 kgs. (161 lbs.) 



This meteorite was first described by Smith, 1 as follows: 



This meteorite came into my possession in the month of July, 1860, being obtained from a plowed field, where it 

 may have lain for a considerable length of time. It is a flattened mass of tough metal, a little scaly at one corner, 

 being 17 inches long, 15 inches broad, and 7 inches in the thickest part, shelving off like the back of a turtle; and 

 weighs 161 pounds. It is free from any large proportion of thick rust, consequently showing no indication of chlorine. 

 Upon analysis the following constituents were found in one hundred parts: 



Fe Ni Co P Cu 



93.10 6.11 0.41 0.05 trace =99.67 



Shepard 2 listed the meteorite as found in 1856. 



Meunier 5 made the meteorite the type of Nelsonite, wliich he describes as — 



A metallic rock, very crystalline, taking a good polish. Formed of an alloy of iron and nickel to which we give 

 the name kamacite, and having the formula Fe 14 Ni. One distinguishes cylindrical nodules of troilite and more or 

 less irregular masses of schreibersite. Acids give very remarkable Widmanstiitten figures. 



