METEOEITES OF NORTH AMERICA. 307 



11. 1892: Cohen. Meteoreisen-Studien. Ann. K. K. Naturhist. Hofmus. Wien, Bd. 7, pp. 151-153 (Analysis), 158 



(Cu), 159, 160, and 161. 



12. 1893: Meunier. Revision des fers m^teoriques, pp. 52-55. 



13. 1895: Brezina. Wiener Sammlung, pp. 268 and 275-276. 



14. 1895: Cohen. Meteoreisen-Studien IV. Ann. K. K. Naturhist. Hofmus. Wien. Bd. 10, pp. 82 and 85. 



15. 1905: Cohen. Meteoritenkunde, Heft 3, p. 316. 



Mitchell County. See Waconda. 



MOCTEZUMA. 



Sonora, Mexico. 



Latitude 28° 49' N., longitude 109° 40' W. 



Iron. Medium octahedrite (Om) of Brezina. 



Found 1899; undescribed. 



Weight? 



This meteorite is mentioned by Berwerth ' and Ward, 2 but no description is given except 

 the data given above. Ward states that the main mass is in the collection of the School of 

 Mines of the City of Mexico. 



BIBLIOGRAPHY. 



1. 1903: Berwerth. Verzeichmss, pp. 20 and 69. 



2. 1904: Ward. Catalogue of the Ward-Coonley Collection, pp. 17 and 83. 



MODOC. 



Scott County, Kansas. 



Latitude 38° 33' N., longitude 101° 5' W. 



Stone. Veined white chondrite (Cwa) of Brezina. 



Fell 9.30 p. m. September 2, 1905; described 1906. 



Weight. Fifteen to twenty stones, weighing in all about 16 kgs. (35 lbs.). 



The first scientific mention of this meteorite was by Merrill 2 as follows: 



A hitherto unreported meteorite fall took place on the night of September 2, 1905, about 9.30 p. m., in Scott County, 

 Kansas. The fall was attended with the usual explosion, light, and sound, variously compared to cannonading and 

 the roll of heavy wagons. 



Thus far 14 pieces of the stone have come to light, the largest of which, weighing 4.61 kg., is at present in the 

 National Museum. A broken surface shows the stone to be indistinctly chondritic, of a very light gray color, and under 

 the microscope is found to consist essentially of olivine and enstatite, with, a very small amount of plagioclase feldspar. 

 It evidently belongs to Brezina's group of veined chondrites (Cwa), and will be known as the Scott County meteorite. 



A further note was published by Farrington 3 as follows: 



Investigation has been made by the writer of the meteorite fall which took place at Modoc, Scott County, Kansas, 

 about 9.30 p. m. September 2, 1905. Mention of the fall was made in the local paper at the time and in Science of 

 March 9. The phenomena of the fall were observed by a large number of the inhabitants of Scott and the adjoining 

 counties. The course of the meteorite, as learned by the writer through inquiries in several counties, was nearly due 

 east. The phenomena were a sudden lighting up of the sky by a swift-moving fireball "as big as a washtub" which 

 quickly exploded with three successive and widening discharges. The explosion must have occurred not far from 

 Tribune, Greeley County, Kansas, since the interval between light and sound there was but a few seconds. The fall of 

 etones, however, occurred at Modoc, about 40 miles farther east, the interval between light and sound there being 

 between two and three minutes. It would appear, therefore, that after the explosion the stones traveled about 40 

 miles before reaching the earth, at a velocity of about one-third of a mile per second. Up to date 13 fragments and 

 individuals have been found, the heaviest having weighed 11 pounds. The other individuals and fragments found 

 range in weight from 7 pounds to a few ounces. The area over which they were scattered is one of about 7 miles in 

 length by 2 miles in width, extending nearly due east and west, the larger stones being found at the east end of the area. 

 The principle that the smaller Btones would fall first is thus corroborated. The stones appear to be of the type of white 

 or gray chondrites and to have the usual composition of meteorites of this character. They are coated, for the most 

 part, with a thick black crust, although considerable breaking up took place in the atmosphere, bo that some fragmente 

 have only a secondary crust or none at all. The total weight of individuals thus far collected is 32 pounds. 



