120 Field Columbian Museum — Geology, Vol. III. 



ite and probably a mesosiderite. The error of notation would not 

 have been significant but for the fact that the accompanying de- 

 scription was copied by Cohen* in his account of the brecciated hexa- 

 hedrites. Under the name of Mejillones two masses of different char- 

 acters are now to be found in collections, as was early noted by Meu- 

 nier. f Meunier recommended the name of Pseudomejillones for the 

 iron-stone fall. As such a nomenclature would, however, not be in 

 accordance with present usage it would seem sufficient to designate 

 one as Mejillones, iron, and the other as Mejillones, iron-stone, at least 

 until some further information can be obtained regarding the origin 

 of the masses. It is not impossible, indeed, that they may be parts of 

 the same mass with different structures, as occurs in many pallasites. 

 Of Mejillones, iron, but a small quantity seems to be known. Of the 

 specimens listed by WulfingJ under this name, those of Harvard and 

 Ward are iron-stone. The Harvard specimen was obtained by pur- 

 chase from Ward and Howell§, as was also the specimen in this Muse- 

 um. Excluding these it leaves the specimen in the Paris collection as 

 perhaps the only well-authenticated one of the Mejillones iron. This 

 specimen according to Meunier was received from Domeyko. 



MODOC. 



This meteorite has already been made the subject of a brief note!| and 

 detailed study ^f by Merrill and a note by the present writer.** Some 

 additional facts obtained by the writer during a visit to the locality in 

 February, 1906, and by study of specimens seem worthy of record. 

 These observations include accounts of the phenomena of fall obtained 

 from various residents of Modoc, also at Tribune, forty miles west of 

 Modoc. The accounts at the latter place show a much shorter interval 

 to have intervened between light and sound than at Modoc. This 

 seems conclusive evidence that the meteor exploded over Tribune and 

 traveled about forty miles before falling. The accounts here given 

 are arranged in the order of the position of the observers going east- 

 ward. 



Mr. Raines, the station agent at Tribune, was about to lower a cur- 

 tain at an east window when he saw the meteor at the north going 



* Meteoritenkunde, Heft III, p. 233. 



f 1893. Revision des fers meteoriques, p. 75. 



X Die Meteoriten in Sammlungen, p. 230. 



§ Huntington, Catalogue of all recorded meteorites, 1887, p. 93. 



|| Science 1906, N. S. XXIII, p. 391. 



T| Am. Jour. Sci. 1906, (4): 21, pp. 356-360. 



** Science 1906, N. S. XXIII, p. 582. 



