116 O. W. Huntington—Coahwila Meteorites. 
Mr. Hidden’s reasons for thinking the Maverick County Iron 
does not belong to the Coahuila group are as follows (this 
Journal, October 1886, p. 306): “The Maverick County 
Meteorite was found more than one hundred miles in a 
due east direction from the famous Butcher Irons from 
Coahuila and that from the Sancha estate, Mexico, both 
described by Smith. But the density and composition of these 
last two irons show marked differences from that of Maverick 
County, Texas. ‘The Sancha iron had a density of 7°81 and 
presented the figures of Widmanstatt similar to that of the 
Braunau iron,’ (Smith). The smooth surface and regular form 
of this iron from Maverick County would also preclude its be- 
ing a part of another fall, as it seems to be complete in itself.” 
That the Maverick County iron was found one hundred 
miles east of the Butcher iron, does not interfere with its be- 
longing to the same fall; since the Santa Rosa and Butcher 
irons were eighty-five miles apart, the Butcher and San Gre- 
gorio about three hundred, and the San Gregorio and Concep- 
tion about ninety miles apart. Moreover, J. Lawrence Smith 
writes (this Journal 11, 1871, pp. 835-838) that these were 
probably products of the fall of one meteoric mass, moving 
from the northeast to the southwest, the smaller fragments fall- 
ing first. The meteorite described by Mr. Hidden is small in 
comparison with the others, and thus would naturally be found 
farther to the east. 
The Santa Rosa iron weighed 252 lbs. The Butcher irons 
weighed respectively 290, 430, 488, 550, 580 and 654 lbs. The 
San Gregorio was calculated to weigh about five tons, and the 
Hacienda or Conception about 3553 lbs. And then there is 
still a fifth mass said to be larger than any of the others. 
Mr. Hidden states in his paper that the density and compo- 
sition of the Santa Rosa and Butcher meteorites “show marked 
differences from that of the Maverick County, Texas;’’ but he 
mentions the density only of the first. It is wortiby of note in 
this connection that the densities of the Santa Rosa and the 
Butcher irons differ from each other, according to Smith’s de- 
termination, nearly as much as the Maverick County iron dif- 
fers from the Butcher iron, and yet the two former are accepted 
as portions of one fall. . 
In order to see how far we can rely upon specific gravity for 
distinguishing these irons, ten determinations were made with 
different fragments of the same specimen of the Butcher iron, 
and these have been compared below with similar determina- 
tions of the other Coahuila irons. 
