386 MEMOIRS NATIONAL ACADEMY OF SCIENCES, VOL. XIII. 



An analysis of the meteorite was made by Mr. H. W. Nichols. Material for analysis was secured by drilling a half- 

 inch hole to a depth of seven-eighths of an inch, and rejecting the drillings from the crust portion. The analysis gave 

 the following results: 



Fe Ni Co Cu P S C 



89. 84 8. 79 0. 28 0. 07 0. 80 0. 02 0. 09 =99. 89 

 The composition of the meteorite is thus seen to be that usual to medim octahedrites, with a high percentage of 

 phosphorus. From the large amount of schreibersite visible in the sections, such a content of phosphorus would be 

 expected. 



******* 



Cohen, 3 apparently without knowledge of Farrington's account, gave the following: 



This meteorite was first mentioned by Ward in 1904 in his catalogue; data concerning the circumstances of dis- 

 covery, form, weight, etc. , are lacking as yet. According to a brief note from Ward the lamelke are bent in places where 

 there is a pitting of the surface and the bending follows the form of the pit. The usually short bands are straight, puffy, 

 frequently considerably grouped, not granular, and with very strongly marked ta?nite edges. The numerous but 

 always somewhat inconspicuous fields are quite small; they attain a size of 13 sq. mm. only in very exceptional cases. 

 The kamacite appears under the magnifying glass to be uniformly fine-grained; under the microscope it appears to 

 consist of sharply-defined grains of very various and irregular forms, attaining on the one hand a size of 0.05 mm. and on 

 the other hand falling to greater fineness, and the larger number of them showing at the same time a brilliant, oriented 

 luster. Under a much higher power there appears between these portions, dull black iron in the form of a very fine 

 vein, and it seems as if each grain was itself composed of tiny granules. Most of the fields are composed of dense, dark 

 plessite, which in the case of the smaller ones uniformly fills the entire field; in the case of the larger, only a small 

 border band is so dark, while the interior, because of a shading in color, appears brighter, owing to the presence of toler- 

 ably large, evenly inlaid shiny scales. Then follow a few fields which consist of the same kamacite as the principal 

 bands, and which are filled with combs, which as a rule run out only from two adjacent sides; thereby arises a similarity 

 with such fields as consist of small entire lainellre, in which case, however, each small band lies in its own tenite pouch. 

 Occasionally a field shows partly the one partly the other formation. 



Schreibersite occurs abundantly and in considerable size. The crystals are sometimes hieroglyphic in form and 

 as much as 2 cm. in size, sometimes they are small and elongated and then attain a length of 4 cm. and a thickness of 

 2 mm. Compact isometric individuals also occur in isolation. The swathing kamacite is entirely like the kamacite of 

 the lamella;. Troilite was wanting entirely in a plate 250 cm. square. Magnetite occurs occasionally as a filling of 

 crevices quite deep in the interior. 



Bella Roca and Rodeo seem quite similar, but are distinguished by more thorough study, on the one hand because 

 of the formation of the kamacite, which, in the case of Bella Roca even upon very great enlargement, still remains 

 exceptionally fine-grained, and on the other hand by the occurrence of combs in Rodeo. 



Analysis by Dr. O. Burger: 



Fe Ni Co Cu Cr P S Residue 



86.95 11.27 1.20 0.01 0.03 0.25 0.01 0.07 =99.79 



The meteorite is chiefly preserved in the Field Museum. 



BIBLIOGRAPHY. 



1. 1904: Ward. Catalogue of the Ward-Coonley Collection, p. 21. 



2. 1905: Farrington. Publ. Field Columbian Mus., Geol. ser., vol. 3, No. 1, pp. 1-6, plates 1-4. 



3. 1905: Cohen. Meteoritenkunde, Heft 3, pp. 297-299. 



Rogue River Mountains. See Port Orford. 



ROSAPJO. 



Northern Ilonduras, Central America. 



Latitude 14° 40' N., longitude 88° 45' W. 



Iron. Coarse octahedrite (Og), of Brezina. 



Known 1895; undescribed. • 



Weight, ? 



This meteorite is mentioned in Berwerth's * and Ward's 2 catalogues, and in Ward's cata- 

 logue it is stated that the main mass is in the Bement collection, undescribed. No further 

 information at present is available regarding the meteorite. The piece in the Bement collec- 

 tion, now in the American Museum of Natural History, weighs 1,567 grams. 



BIBLIOGRAPHY. 



1. 1903: Berwerth. Verzeichniss, p. 76. 



2. 1904: Ward. Catalogue of the Ward-Coonley Collection, pp. 21 and 87. 



