ao. ss can et ew Meteoric Iron. 119 
equally good for all in the Cortlandt and Stony Point area, 
and forall variations in the kinds and the thicknesses of the 
rocks, and their intercalations. Whether true or not, it must, 
after the survey of the facts, be admitted to be nothing : agai nst 
it that the rocks are massive crystalline rocks ; that among 
them are hornblendic and augitic kinds containing soda-lime 
feldspars, and that some of them are chrysolitic. 
Having presented the claims of the three ch saan T leave 
the subject without expressing a personal opini 
he Appendix to this memoir, to which attusion has been 
made, will appear in a following Ph hie of this Journal. 
Art. XX.—On a new Meteoric Iron, of unknown locality, in the 
Smithsonian Museum; by Cuaries UPHAM SHEPARD. 
HAVING received a fragment from a meteoric iron, of un- 
known locality, belonging to the Museum of the Smithsonian 
Institution, I have made an examination of it with the follow- 
ing results: 
e mass was oval in form, with three or four Prominent 
knobs. Its weight was probably about six pounds. The fra 
ment for examination was separated se considerable facility. 
requiring only a few smart blows of the hammer; and re- 
schreibersite. After polishing, pial te ragm t had a somewhat 
whiter color than artificial iron. When pean) it showed a 
homogeneous, finely crystalline texture, and became still whiter 
in color. When viewed at fixed angles of reflexion, sur- 
face Hiciabee sinanltadieduly, after the: manner of s 
oligoclasite, thus rendering it probable that the byatallicatiei 
of the general mass was that of. a single individual, 
It is obscurely ager in some portions, with bars about 
gyth of an inch in thickness. But the most remarkable 
feature of the etched fast ie is its thickly dotted or punctate 
character; the dots which are very bright, instead of being 
salient points, are slightly concave. On the whole, therefore, 
this iron differs in structure from any meteoric iron thus far 
known. The composition, as determined by C. U. Shepard, Jr., is 
Cova 0.2.40. 0°539 
Schreibersite (phloepinal of iron) -. 0°562—100°095 
There are traces also of copper and tin. The poe sur- 
faces show no tendeny to deliquescence. Sp. gr.= 
Charleston, Feb. 19, 1881. 
Am. Jour, winationes Series, Von. XXII, No, 128.—Avaust, 1881. 
