16 



MEMOIRS NATIONAL ACADEMY OF SCIENCES, VOL. XIII. 



important paper of Mexican origin on meteorites, and this catalogue is very brief. This lack 

 of local investigation of Mexican meteorites has compelled obtaining accounts of these mete- 

 orites chiefly from foreign travelers and their reports are often incomplete and conflicting. 

 Accordingly, our knowledge of Mexican meteorites is far from satisfactory. From the Dominion 

 of Canada few meteorites are known, but these have been quite satisfactorily described. 



To foreign students North American meteorites have furnished material for valuable 

 contributions to meteorite knowledge. Chladni's early studies were in part based on North 

 American material and Partsch, Rose, Reichenbach, Haidinger, and Rammelsberg later classified 

 and analyzed many of these bodies. Succeeding or in part contemporaneous with the above 

 investigators were Daubrfie and Meunier in France, and Maskelyne and Flight in England. 

 Original investigations of single American falls by these authors were, however, not numerous, 

 and the publications relating to American meteorites in foreign works previous to the Vienna 

 catalogue were largely copies of descriptions made by American students. 



In later years the foreign investigation of American meteorites has been carried on chiefly 

 by Tschermak, Brezina, Cohen, and Berwerth, and to some extent by Weinschenk and others. 

 The completeness of the collection at Vienna enabled Brezina in 1885 and 1895 to make much 

 needed careful comparisons of different meteorites, to determine to what falls they belonged and 

 to clear up much of the confusion resulting from a previous lack of such opportunity. Thus he 

 was able to show the distinctness of Misteca and Yanhuitlan, although they had been assigned 

 to one fall, and of Chupaderos, Morito, and Adargas, also generally grouped as one. In addition, 

 Brezina gave careful descriptions of the structural characters of a large number of iron meteor- 

 ites. A somewhat similar work, though under a different classification, was performed by 

 Meunier. An admirable work was performed by Cohen in his extensive studies of a large number 

 of iron meteorites, many of them North American in origin. These studies were historical, 

 chemical, and structural, and thoroughly gave the characters of the meteorites investigated. 

 Some of Cohen's results which directly affect the identity of American meteorites, were his 

 distinction of Duel Hill and Jewell Hill and of Lime Creek and Walker County and his detection 

 of the pseudometeoric character of Scriba and Long Creek. 



List of meteorites by States or countries. 



