46 FirLp CoLumBIAN MusEuM—GEOLoGY, VOL. 1. 
AEROSIDEROLITES OR IRON-STONE METEORITES. 

Weight 
Cat Date 
NAME AND DESCRIPTION. in grams. 
No. | of Fall or Find. 


Found 1874. | Mejillones, near Desert of Atacama, South 
America. 
172 Thin, polished slab. The nickel-iron is distributed 
in a fine network and occasional nodules through 
an amorphous ground-mass. (W.) 37 
Fell 1879, Estherviile, Emmett County, Iowa. 
175 | May 10. Four complete individuals, varying in size from 
oe MM! that of a pea to that of a walnut. The surface 
shows rounded knobs, and is partly of the color 
of blued steel and partly nickel-white. (K.) 70 
176 Irregular fragment, much oxidized. (W.) 795 
177 Full-sized slab, polished. The iron appears in 
large nodules, irregular flakes and a long, narrow 
vein, distributed through a greenish-black, struc- 
tureless ground-mass, (W.) 2,121 
178 *Thirteen complete individuals, varying in size 
from that of a pea to that of a walnut. Surface 
like No. 175. (W.) 47 
Found 1880. | Carroll County, (Eagle Station), Kentucky. 
180 Sawed slab showing natural surface deeply pitted, 
and polished surface. ‘The iron matrix encloses 
nodules of olivine, some a centimeter in diam- 
eter, transparent, and of brilliant lustre. (K.) 106 
182 Grains of olivine, separated from the iron, some 
coarse and some in a powdered state. (K.) 96 
Found 1885. | Pavlodar, Semipalatinsk, Asiatic Russia. 
183 Polished fragment, made up principally of olivine 
enclosed in an iron matrix. Also some loose 
grains of olivine. (W.) 15 
Found 1887. | Rockwood, Cumberland Co., Tennessee. 
184 From Mass No. |. Thin slab showing natural and 
etched surfaces. The metallicgrains aresmall and 
about evenly distributed, except for three large 
nodules, one of which, having a diameter of 
1.5 cm. shows well marked W.f. The metallic 
portion serves as a matrix to hold the siliceous 
a grains. (W.) 40.5 
185 Mass No. 2. Complete individual. The crust is 
reddish-brown and cracked in several places. 
No well-marked pits are seen. (W.) 4,351 
186 From Mass No. 8. One-half of the original find, 
with natural and polished surface. General struc- 
ture like No. 184, but the specimen shows a 
larger proportion of the non-metallic minerals, 
and these occur occasionally in large nodules. 
‘s (W.) 801 
187 From Mass No. 1 (?). Large segment showing nat- 
ural and polished surfaces. Structure like No. 186. 
(W.) | 6,151 
374 *Segment of complete individual, showing natural 
and polished surfaces. Structure like No. 184. 
(W.) 670 
