20 FIELD CoLUMBIAN MusgEuM —GeEo.oey, VoL. ILI. 
pits in general have rounded outlines, and are about half as deep 
as broad. A diameter of about half an inch (z cm.) is common, 
but occasionally a breadth of one and a half inches (4 cm.) is reached. 
At one point the bottoms of two pits on opposite sides meet and 
produce the perforation shown in Plate XIV. This perforation is 
about one-fourth of an inch (5 mm.) in diameter. Another pit 
above this point produces a similar though -smaller perforation. 
A broader, shallow concavity with subordinate pits occurs upon 
this same surface. The diameter of the outer rim of this concavity 
is about three inches (8 cm.). The other broad surfaces of the 
meteorite tend to be plane or convex. In addition to the pits, which 
are confluent at their bases, there aremany confluent at their sides, 
producing irregular, sinuous depressions all over the surface of 
the meteorite. While these cavities are referred to as pits they 
should probably not be regarded as due to the aérial course of the 
meteorite. Onthe contrary they are altogether produced, so far as 
can be judged, by the weathering out of chrysolite from the metallic 
matrix. That they indicate cavities previously occupied by chrys- 
olite is shown partly by the spheroidal shape of the pits and partly 
by the remains of chrysolite in some of the pits. The edges of the 
pits are for the most part rounded so as not to leave sharp, pro- 
jecting points. Such. roundings may well have been caused by 
fusion during the passage of the mass through the atmosphere. A\i- 
though the substance of the meteorite is tough and firm as a whole. 
the surface is considerably rusted and the pits filled to some extent 
with sand cemented with iron hydroxide. This indicates that the 
meteorite has been exposed for some years to the elements, but 
not many, for a moist climate, such as prevails in the region 
where it was found, would cause rather rapid decomposition. The 
coating of rust on the projecting ridges and points of the meteorite - 
or in the pits not filled with sand is very thin, a single scratch 
with a file serving to reveal bright metal beneath. This rust 
is dark brown in color. Where the pits are filled with cemented 
sand the color becomes a yellowish-brown. There is no_indi- 
cation in the contour of the mass of its having been subjected to 
movement and pressure, such as it would have undergone had it 
been glacially transported. The indications are, therefore, that the 
mass fell not many years ago near where it was found. 
The specific gravity of the meteorite was determined by weigh- 
ing carefully the entire mass, first in air and then in water. This 
gave the valueG= 4.28. Assuming the specific gravity of chrysolite 
