METEORITES OF NORTH AMERICA. 129 



A list of the irons at different times included among the Coahuila hexahedrites is given 

 by Cohen, 53 as follows : 



1. Sanchez Estate, Santa Rosa, Coahuila (Saltillo: Couch-Iron); 1850. Here belongs also 



Genth's New Mexico; 1854. 



2. Cerralvo, Nuevo Leon; 1856. 



3. Hacienda Santa Rosa, Coahuila; 1863. 



4. Bonanza, northwest of Santa Rosa, Coahuila; 1866. 



5. Butcher's Iron, Coahuila (also known as Bolson de Mapimi (Mapini); 1866. 



6. Hacienda Potosi, District Galeana, Nuevo Leon; 1870. 



7. Smithsonian Iron (''unknown locality") of many English catalogues; 1881. 



8. Fort Duncan, Maverick County, Texas; 1882. 



9. Santa Rosa, Coahuila (Lupton's Iron); 1S85. 

 10. Santa Rosa de Muzquiz, Coahuila; 1889. 



Of the above, those of Cerralvo and Hacienda Potosi seem to be lost and may be disre- 

 garded. Cohen 53 gives a further history of the group, as follows : 



Santa Rosa de Muzquiz, Hacienda St. Rosa, Santa Rosa (Lupton's Iron). — According to Castillo,' 6 Santa Rosa de 

 Muzquiz is a roundish, nonoxidized block; the iron shows Widmannstatten figures. From the latter statement it 

 does not follow that this is not a hexahedrite, since by many authors Neumann lines are regarded as Widmannstatten 

 figures. 



Under the name of Hacienda St. Rosa Wichelhaus 5 described a meteoric iron obtained by Posselt from the 

 Heidelberg collection. It was of an entirely homogeneous appearance; the absence of Widmannstatten figures was, 

 as in so many cases at that time, referred to the scarcity of schreibersite. The analysis follows (I, p. 131). Rose 6 

 adds that the iron constitutes an individual, cleaves in entire conformity with the cube, gives Neumann lines, con- 

 tains numerous rhabdites lying parallel to the angles of the hexahedron, and corresponds exactly with Braunau and 

 Claiborne (Walker County). Rose, however, makes a wrong use of the data from Burkart; since these refer to Saltillo, 

 Rose supposed that the latter iron was identical with Hacienda St. Rosa. According to Posselt, in the region in ques- 

 tion, "Iron of meteoric origin lies scattered around in large blocks, or extended over a long stretch by rolling." 



Lupton 26 saw, in front of a house in the neighborhood of Santa Rosa, a block of irregular form, estimated at 97 

 kgs. weight, which was said to have come from the same region as the masses collected by Butcher. The iron gave 

 no Widmannstatten figures and its characteristics corresponded with the description by Smith. The analysis 

 follows (II, p. 131). 



Fletcher 3S regarded St. Rosa, Santa Rosa de Muzquiz, and Santa Rosa as one and the same locality, which he 

 designated upon his labels as Santa Rosa de Muzquiz. Likewise it is scarcely to be doubted that all the masses 

 observed in the city and its neighborhood were transported thither from the same region not far distant. 



Bonanza. — According to Shepherd, 7 fourteen massive blocks of iron lay in a locality 160 miles northwest from 

 Santa Rosa, the largest of which had the form of a beehive with a diameter of 1.5 m., projecting more than a meter 

 above ground, and still considerably embedded therein. His companion, Hamilton, estimated the distance from 

 Santa Rosa as considerably less and mentioned only thirteen more or less rounded masses free from rust, which lay as 

 far as 1 mile from one another. According to this author a block weighing 34 kgs. was brought to Santa Rosa; of 

 the rest the smaller ones weighed from 900 to 1,400 kgs. Shepard 7 selected for the iron, of which he possessed a piece, 

 in accordance with the label from Shepherd, the name Bonanza, and thought that it was different from the Sancha 

 Estate iron. He noted several shallow pittings on the natural surface, no fusion crust, distinct cleavage, etching lines, 

 some rhabdite, and emphasized the structural identity with Braunau. The analysis of the iron follows (III, p. 131). 



It is concerning the same locality, no doubt, that Veatch and Schott reported, although the distance from Santa 

 Rosa is given differently. In 1849 Veatch 8 saw a large mass of iron, used as an anvil in Santa Rosa, and he learned 

 of numerous pieces of the same sort which had been used for various purposes, and which had come from the moun- 

 tains northwest of the city. Schott 4 learned from Long that 90 miles northwest from Santa Rosa numerous masses 

 of iron were to be found up to the size of a cubic meter; from one weighing about 11 kgs. had been hammered out, 

 without heating, several small objects. 



Butcher iron. — In 1868 Butcher 12 brought to the United States from a locality 90 miles northwest from Santa 

 Rosa eight blocks weighing respectively 131J, 160, 183J, 195, 198§ 249£, 263, and 296 j kgs., or a total of 1,678 kgs. He 

 estimated the original masses considerably higher in weight, since on the one hand it was with difficulty that all the 

 blocks were found, and on the other hand a few of the blocks had been brought to Santa Rosa at an earlier date, in 

 the belief that they were silver. According to a communication from Long, Butcher was inclined to refer the iron 

 masses to a meteor which was observed at Santa Rosa in 1837 and which had moved in a northwesterly direction. At 

 all events as early as 1837 an Indian had brought a piece of the iron to the city. 



According to Smith, 10 the blocks are of irregular form, compact, entirely free from silicates, and composed of soft, 

 easily cut iron. The analysis follows (IV, p. 131). Smith supposed that the iron known under the name of Santa Rosa 

 came from the same locality; Burkart u considered that Saltillo was to be included here also. 

 716°— 15 9 



