10 FriELD CoLuMBIAN Museum —GEo_oey, Vot. III. 
have been made about the time the meteorite struck the. earth. 
It passes along the plane of a nickel-iron-troilite véin such as appears 
in other parts of the meteorite, and the position of this vein doubt- 
less determined the fracture. Of the narrow surfaces of the mete- 
orite, one, that shown in Plate VII, has a rugose character and 
incomplete crust similar to that of the front side of the meteorite. 
Here, evidently, the meteorite split off from some other mass dur- 
ing its descent to the earth. The other narrow surfaces, shown in Plate 
VIII, have a complete crust and rounded edges. Their pittings 
are few and irregular and show rounding and smoothing. 
By means of a cast of the larger stone, kindly furnished the 
Museum by Dr. Borgstrom, it was possible to determine in what 
manner the two stones may have been joined together. The rear 
and front sides are so plainly marked on both stones and the surface 
of mid-atmospheric fracture so evident in the smaller one that there 
is little difficulty in deciding that the stones were joined together in - 
the manner indicated in Plates IX and X: Of these, Plate IX 
shows what, in the view of the writer, was the front side of the, 
meteorite in its descent and Plate X the rear side) [his deter- 
mination does not however, accord with that of Borgstrém; 
for the larger stone. Borgstrom reverses them,* basing his 
determination’ chiefly on the -fact »that (on ~what @aiew te- 
gards as the rear side, the apparent directions of flow of 
molten matter point in a general way toward the center of the 
mass. These directions of flow are determined by a heaping of 
the crust on the sides of the pits. Such indications, however, are 
liable to be deceptive. Several pits on the smaller stone show 
drift phenomena in one direction or another which, in the present 
writer’s view, are to be regarded as remains of flows from the centers 
of the pits outward. These flows probably take place in all directions 
but leave traces only here and there. All the other characters of 
the side regarded by Borgstrém as the rear one seem without ques- 
tion to be those of the front. It has a generally arched or conical 
character, a relatively large extent of surface, and deep pits. These 
are well known characters of the front side of oriented meteorites. 
Moreover, if this were. regarded the rear side, the side which 
must be taken for the front is one having a form concave toward 
the direction of movement through the air. It is hardly conceiv- 
able that the mass could have come through the air with its con- 
cavity foremost. The form obtained by joining the two stones - 
TOD uct. p..o4, 
