338 0. U. Shepard—Meteorie Iron from Georgia. 
cross each other at right angles, while in a second series, less 
uniform in width, they pass diagonally (in descending) from 
- right to left across the shaded spaces. 
1 S'S 
Me) 25 f LE INO 
The shaded portions are in no way different in composition 
or structure from those which are in white, as may be seen by 
receiving the light from them on the polished metallic surfaces 
at a slightly different angle. This changeability doubtless 
depends upon a crystalline structure analogous to that produc- 
ing a similar effect in numerous crystalline minerals, particu- 
larly in the family of feldspars. 
On etched surfaces, the schreibersite shows in exceedingly 
thin and nearly straight continuous lines, though they are 
occasionally interrupted at short intervals, when they resemble 
the markings on telegraphic ribbands. The continuous lines 
sometimes swell into triangular or polygonal enlargements, 
forming a string of nearly disconnected beads, as represented 
by G. Rose in the Zacatecas iron. These beads he denominates 
crystals. 
The specific gravity of the iron is 7-986, a density somewhat 
higher than common in meteoric irons, but not unexpected in 
one like the present, destitute of sulphur and containing less 
phosphorus than usual in these bodies. 
The analysis of C. U. Shepard, Jr., gave 
Mot oo 94°66 
IONE! Cool a se, es eee 
CE ee 0°34 
chlorous Pas eRe and it appears to have been easily 
separated by 
