498 G. Lf. Kunz—WMeteoric Iron from Arkansas. 
as thin asa hair. One of these is 10™ long and extends from 
the highly fused edge above mentioned toward the center. 
The others are from 3°™ to 5° long. These are so evenly ar- 
ranged that they are without doubt ‘ Reichenbach lamellen ” 
in which the inner troilite has been burnt out. If such is the 
case they are as abundant asin the Staunton, Va., meteoric iron. 
On the upper side ten nodules of troilite are exposed, meas- 
uring from 83™™ in. diameter to 55™ long and 25™™ wide. On 
the lower side there are 12 such nodules exposed, 13™™ in _di- 
ameter, while the largest: measures 19™™ by 39™™. On the 
upper side these nodules are coated in spots with a black crust 
similar to that found on the mass, but on the lower side the 
crust extends completely around the side of the nodules, show- 
ing the fusion very plainly. The troilite is very bright and 
fresh, like a newly broken mineral, and on the upper side one 
of the nodules shows deep striation, suggesting that the entire 
nodule is one crystal and the exposed part is only one side of 
it. In some cases where the nodules were broken they were 
found to be iridescent. This is one of the octahedral irons 
showing the Widmanstatten figures beautifully on etching (see 
figure 8), and is one of the Caillite groups of Stanislas Meunier 
and of the mitilere lamellen of Brezina. The lamelle are 1™™ 
wide and the markings more closely approach the Rowton* and 
Mazapilt irons. Figure 4 shows the etching on the surface of 
the unpolished exterior, there being no crust. The lower end 
of the figure which is flat, was produced by the hammering off 
of the piece; but the etching is really finer where it was done 
on the natural surface of the iron. The specific gravity of the 
small piece figured is 7°73. ‘T'roilite, as before stated, is very 
abundant in the mass. Schreibersite and carbon have also been 
found between the laminz. Chlorine is present only in slight 
quantity, as scarcely any deliquescence has been observed. 
The following is a comparative table of analyses of meteoric 
irons most nearly approaching this in composition : 
* Meteoriten Sammlung des k. k. mineralogisches Hofcabinet in Wien., 8vo, 
Wien, 1885, Plate 2, figure 2. 
+ This Journal, IIT, vol. xxxiii, p. 225, fig. 2. 
+ The full analysis of this iron made by Mr. J. E. Whitfield will be: given in 
an article following this. 
