94 ROCHESTER ACADEMY OF SCIENCE. [June 23, 
The part insoluble in hydrochloric acid would appear to be enstatite with much 
of the magnesia replaced by iron, and to be the most abundant of the minerals present in 
the stony portion of the meteorite. 
The conclusions drawn from the part soluble in hydrochloric acid (less the metallic 
portion) are less satisfactory, there being probably more than one mineral present. 
Anorthite is suggested as predominating. 
JouHn M,. Davison, Reynolds Laboratory, 
June 30, 1890. University of Rochester. 
* 
The fragments of the Llano del Inca meteorite, of which Prof. 
Ward secured 27 lbs., were found in 1888, as already stated, 35 
leagues S. E. of Taltal, Atacama, Chili, on the Llano del Inca. All 
the fragments are small, the largest weighing only 4% ozs. They 
appear much more solid than those of the Dofa Inez, none of them 
showing that cracked appearance or the “green mould.” Sawed and 
polished sections of the two meteorites, however, are in many cases not 
distinguishable, but some fragments of the Llano del Inca contain very 
little iron, and considered by themselves would indicate another fall. 
One piece which we have polished seems, however, to unite the two 
extremes, one side containing a large amount of iron, while the other 
side, half an inch distant, contains only a few particles. 
The following analysis of an apparently average specimen has been 
furnished through the kindness of Mr. L. G. Eakins, of the U. 5. 
Geological Survey, and the courtesy of Prof. F. W. Clarke, chief chemist: 
ANALYSIS OF THE LLANO DEL INCA. 
Approximate composition of the mass. Analysis of nickeliferous iron. 
Metallic 25.8 He39.77 
Troilite 10.6 Nino a7, 
Siliceous | Sol. in HC]. 30.9 . Connor 
portion. | Insol. in HCl. 32.6 - 
99-55 
Analysis of siliceous portion from which all the metallic had been extracted, 
Soluble in Hydrochloric Acid. Insoluble in Hydrochloric Acid. 
i 2. Be 4. : 
Si Og. 11.53 11.53 28.08 23.15 53-11 
Ale Os. 5.23 5-23 12.74 1.01 2.32 
Crp Os. Shot Bie Seat: 39 .gO 
Fe O. 28 39 17.46 42.52 8.20 18.82 
Ni O. t.19 1.9 2.90 S56 508 
Mn O. .08 .08 .20 ee aioe 
Ca O. 3-83 3-83 9 33 -70 1.75 
Mg O. St 81 1.98 10.07 23.10 
Py O5. 93 93 2.25 lr. 
S. GeO.) wehek Ns fbx ceusaete AAS 
57-57 41.06 100.00 43.58 100.00 
Wess|OlMor S925 4) 
