286 MEMOIRS NATIONAL ACADEMY OF SCIENCES, VOL. XIII. 



may certainly be included. For purposes of comparison of analyses, several that have been made of Toluca irons by 

 different authorities are given below: 



1. Taylor, Amer. Jour., Sci., 3d ser., XXII. 374. 1856. 



2 and 3. Pugh, Annal. der Chem. und Pharm. XCVII. 385. 1856. 



4. Nason, Jour. Prakt. Chemie. LXXI. 123. 1857. 



1 23 4 . Loa Reyes. 



Fe 90.72 90.74 87.89 90.133 90.56 



Ni 8.49 7.78 9.06 1 f 7.71 



Co 0.44 0.72 1.07 f \ 1.07 



Cu 0.03 .... .... 0.14 



Mn 0.20 trace 



S 0.03 trace 0.025 



.... 0.01 



P 0.18 0.24 0.62 0.376 0.24 



X 0.63 .... 0.22 2.225 



Insoluble residue. . . 0. 34 0. 096 



100.46 99.88 99.06 99.975 99.851 



The resemblance in chemical composition to the average of Toluca irons is thus seen to be close. Further, the 

 etching figures come within the limits found in Toluca irons, since these vary considerably in detail as is well known. 

 The meteorite will be designated, therefore, as Toluca (Los Reyes). 



The features of the above account which seem to warrant regarding the meteorite an inde- 

 pendent fall are the distance (40 miles) of its place of find from Toluca and the abundance of 

 schreibersite and lack of troilite which the meteorite shows. In the Toluca meteorites schrei- 

 bersite is usually lacking or occurs only in compound nodules, and troilite is abundant. 



The meteorite is preserved entire in the collection of the Field Museum, Chicago. 



BIBLIOGRAPHY. 



1. 1902: FARKINGTON. Meteorite Studies, I. Publ. Field Columbian Mus., Geol. ser., vol. 1, pp. 305-310. 



LOSTTOWN. 



Losttown Creek, Cherokee County, Georgia. 



Latitude 34 10' N., longitude 84 30' W. 



Found, 1868. 



Iron. Medium octahedrite (Om), of Brezina; Lockportite (type 16), of Meunier. 



Weight, 3 kgs. (6 Ibs. 10 ozs.) 



This mass was first described by Shepard, 1 as follows: 



This iron was plowed up in April, 1868, on the farm of Mr. Michael Sullivan, 2.5 miles southwest of Losttown, 

 Cherokee County, Georgia. It weighs 6 pounds, 10 ounces, and has a very striking resemblance in form to a human 

 foot. Its color is almost perfectly black, and is wholly free from stains of iron rust. It exhibits no tendency to exfoli- 

 ation, nor is it uniformly covered by a fused coating. Widmannst&tten figures are visible directly in one portion of 

 the surface. The indentations are broad and shallow, though on the whole well pronounced. A thin slice weighing 

 27 grams was sawed from the heel end of the mass. The hardness proved uniform, no pyrites having been encoun- 

 tered in the section. The specific gravity of the fragment is 7.52. On being etched with dilute nitric acid, very beau- 

 tiful WidmannstStten figures were presented, not quite identical with any with which I am acquainted, but most nearly 

 resembling those of the Seneca Lake iron, the difference between the two consisting mainly in a less breadth to the 

 bars by about one-third in the former of these irons. I have thus far found time only to examine the filings (or rather 

 sawings) of this iron for sulphur and nickel. The first is wholly wanting, while the latter is abundantly present. 



A year later Shepard 2 gave an analysis of the meteorite as follows : 



Fe Ni Cr, Co, Sn, Mg Insoluble residue 



95.759 3.660 traces 0.58 =99.999 



Brezina s described the structure as follows : 



Losttown presents a somewhat irregular structure; plates 0.4 to 0.6 mm. broad; lamellae partly grouped, partly 

 isolated, always puffy; kamacite flecked, sometimes granular, sometimes not; tsenite well developed, fields now largo 

 and predominating over the kamacite, now almost lacking, generally dark, flecked, and glistening, for the most part 

 entirely without combs; in the infrequent case where combs are present, they fill the fields entirely. Schreibersite is 

 abundant and irregularly distributed. 



