METEORITES OF NORTH AMERICA. 391 



It is a typical example of the class of siderites, weighing complete about 237 kgs. , with general dimensions of about 

 80 by 60 by 20 cm. The exterior exhibits in a splended manner the characteristic markings of meteoric iron. On the 

 flat side, shown in a plate, are two cup-shaped pits of 10 to 12 cm. diameter which constitute a remarkable feature; the 

 smaller depressions or "thumb-marks" of 3 to 4 cm. diameter, which cover the remainder of the surface, are also repro- 

 duced in minute detail. 



At the point where the fragments were removed the octahedral cleavage and lines of crystallization are noticeable 

 to a degree rarely seen in iron. It is, however, on the etched surface prepared through treating a polished slab with dilute 

 nitric acid, in the usual manner, that the beauty of the crystalline structure is best seen. In this respect it ranks among 

 the finest of recorded irons, the Widmannstatten figures being exceptionally regular and distinct. An accompanying 

 print was made directly from the etched surface. The broad bands of kamacite are symmetrical, the prominence of 

 the interlacing of shining white threads of the nickeliferous iron being especially remarkable, and distinguishing it 

 from the ElCapitan meteoric iron, weighing about 28 kgs., and found in 1893 about 90 miles north of the Sacramento 

 Range. In the latter iron the percentage of iron is less and nickel greater, phosphorus also being present. For a careful 

 quantitative analysis the writer is indebted to Mr. J. Edward Whitfield (with Booth, Garrett & Blair, of Philadelphia), 

 who obtained the following results: 



Iron 91. 39 



Nickel 7. 86 



Cobalt 52 



99.77 

 The mass is perfectly preserved, there being no sign of disintegration or exudation of lawrencite. The sawing 

 done shows it to be quite soft and generally homogeneous. The entire lack of surface alteration proves that it fell at a 

 comparatively recent date and leads to the conclusion that it is the meteor seen to fall by Mr. Bartlett, whose account 

 led to the discovery. 



The meteorite is distributed. 



BIBLIOGRAPHY. 



1. 1897: Foote. Amer. Journ. Sci., 4th ser., vol. 3, pp. 65-66. (With cut of exterior and etched surface.) 



Saint Croix River. See Hammond. 

 Saint Elizabeth. See Lucky Hill. 



SAINT FRANCOIS COUNTY. 



Missouri. 



Here also Southeastern Missouri. 



Latitude 37° 49' N., longitude 89° 55' W. 



Iron. Coarse octahedrite (Og), of Brezina; Arvaite (type 7), of Meunier. 



Described 1869. 



Weight, 2,418 grams (5 lbs.). 



This iron was first described by Shepard l as follows : 



For my knowledge of this iron I am indebted to Prof. B. F. Shumard, of St. Louis, who sent me a specimen of it 

 several years ago, but through an accident it failed to reach me until lately. He wrote me under date of November 

 4, 1868, as follows: "The specimen is from one in the collection of the St. Louis Academy of Sciences, which I found 

 among minerals that belonged to the old Western Academy of Sciences of St. Louis. The label with it gives only 

 'S. E. Missouri' as the locality. Its meteoric character was unknown until I examined it." In reply to my request 

 for further information Professor Shumard has favored me (December IS) with the following additional particulars: 



"The specimen in the Academy's collection is irregularly lozenge-shaped, 3.3 inches long, 1.5 wide, and 1.1 

 inches thick. The extremities and upper face are rough and irregular, one lateral piece is smooth with a wavy sur- 

 face, the other has been cut to supply specimens to Professors Silliman, Haidinger, and yourself. 



"The under side is rough near one end, while the remainder of it has been smoothed by hammering. The speci- 

 men bears the appearance of having been heated. Its present weight is 9 ounces, and if you will add to this what has 

 been taken to furnish the specimens referred to above you will probably not be far from the truth in calling the origi- 

 nal weight 12 ounces. Nothing has been published concerning the specimen. I discovered it in the museum of the 

 academy during the year 1863." 



In respect to the figures developed by etching it belongs to my order of megagrammic irons, and most resembles 

 those of Arva and Cocke County. It is rich in schreibersite, insomuch that when long exposed to acid, this mineral 

 projects in thick laminae above the surface, resembling mica on certain weathered coarse-grained granites. The bars 

 and spaces which are intermediate, however, are not traversed by those delicate lines of the same substance, so gen- 

 erally occuring in other irons. 



