34 PROCEEDINGS OF THE AMERICAN ACADEMY 



Exactly the same result was obtained in breaking slabs of the 

 Maverick County* iron, and also the iron from Chattooga County, 

 Georgia,! both of which were described as independent falls, although 

 closely resembling the Coahuila specimens. 



Now it will be borne in mind that the Coahuila irons form a group 

 by themselves, their etched surfaces appearing so markedly different 

 from any other known meteorite, and for this reason, together with a 

 resemblance in composition, they have commonly all been considered 

 to belong to one fall. But, after examining the structure of the 

 Butcher irons and that of the Saltillo or Saucha Estate as exhibited 

 by the cleavage, it is impossible to class them as portions of a single 

 original mass. And, on the other hand, when we compare in the 

 same way the Saltillo iron with those of the Allen County, Chattooga 

 County, and Maverick County meteorites, it seems equally impossible 

 to believe that they did not at one time form a single meteorite, espe- 

 cially when they also resemble each other in composition as shown 

 in the following analyses, though to be sure it is hard to tell how far 

 such analyses can be depended upon as a means for comparison or 

 distinction of irons. 



99.95 99.59 10U.U0 99.99 



That these masses were found in places so remote from each other 

 does not seem to preclude their having belonged to one individual, 

 since the Rochester meteorite was seen to pass over the States of 

 Kansas, Missouri, Illinois, Indiana, Ohio, and is supposed to have 

 passed over Pennsylvania and New York, and thence out to sea, drop- 

 ping fragments in its course. It therefore is possible that at some 

 remote period an enormous iron meteorite may have passed over the 



* Amer. Jour. Sci., 3d series, vol. xxxii. p. 304, October, 1886. 



t Ibid., vol. xxxiv. p. 471, December, 1887. 



t Ibid., vol. xxxiii. p. 500, 1887. 



§ Ibid , 2d series, vol. xix. pp. 160, 101, May, 1855. 



|| Ibid., 3d series, vol. xxxii. p. 304, October, 188G. 



IT Ibid., vol. xxxiv p. 472, December, 1887. 



