2 
MUSEUM BULLETIN NO. 15. 
specimen are illustrated in Plate I. It showed unmistakeable 
evidence of having been subjected to attrition with other sub- 
stances and there were no signs of the pittings to be observed on 
meteorites of recent fall. The surface was covered with a thin 
scaly crust of rusty materials. On one portion of the surface 
a natural etching has been produced forming a network of coarse 
rhombohedral figures. An average sized figure measures 3 
centimetres in length by 2 centimetres in width. These figures 
are not in evidence on an artificially polished and etched surface 
except at one point where the etching shows to a depth of 2 
millimetres from the edge. It would seem as if the original 
mass had been far from homogeneous and that the specimen we 
now have may be in the nature of a core left by the removal by 
attrition and oxidation of less resistant materials. 
A polished and etched plate presents little that is plain to 
the unaided eye. The surface is clouded and exhibits a dull 
chatoyancy when the plate is viewed at different angles with re- 
spect to the line of vision, the different shades alternating between 
light and dark grey. On one portion of the plate there appears 
a very thin zigzag streak of a silver-white substance having a 
bright metallic lustre, the identity of which is doubtful. In 
some respects it resembles schreibersite, but it possesses a greater 
degree of cohesion than is common with schreibersite. 
When examined under a moderate power of the microscope 
in a direction normal to its plane the plate presents a fine micro- 
granular groundmass broken by abundant narrow trough-like pit- 
tings, generally tapering at each end. Over most of the plate these 
pittings are seen to be disposed with more or less regularity along 
three directions; these features are clearly illustrated in the 
photomicrograph, Plate II. Near the zigzag inclusion to 
which reference has been made the pittings exhibit no regular 
arrangement and their forms are not clearly defined as are those 
on the rest of the plate. Their irregular arrangement and forms 
are illustrated in the photomicrograph, Plate III. 
When viewed obliquely the pittings are seen to be bounded 
by thin envelopes of a silver-white metallic substance. The 
same substance also shows in numerous points, and rarely in 
lath like forms, over portions of the plate. Its identity cannot 
