May, 1902. METEORITE STuDIES, I—FARRINGTON. 301 
breaking rather easily with a blow of a hammer. The specific gravity 
of the whole aerolite of 74 grams taken with the balance at 21°C. was 
found to be 3.504. This value is of course slightly affected by the 
crust of the stone, but as a fragment without crust weighing 3.4 grams 
gave the same result the error from this cause must be very small. 
Under the microscope the rock is seen to be a crystalline aggre- 
gate made up chiefly of grains of chrysolite, bronzite, nickel-iron and 
troilite. Here and there are traces of a structure which may indicate 
chondri or fragments of them, but such occurrences are rare. The 
chondrus-like structures lack definite outline and if of chondritic 
origin can only be considered fragments. One such fragment seen 
consists of alternate narrow lamelle of about equal width, of chryso- 
lite and glass. In another the lamelle of chrysolite are broader and 
the mass has a border of chrysolite. Another suggests a portion of a 
polysomatic chrysolite chondrus. The grain of the stone as a 
whole is coarse, many of the chrysolite individuals reaching 
diameters of 0.2 to 0.4 millimeters. These incline to a porphyritic 
development, although the whole rock is crystalline. The chryso- 
lite individuals are in general considerably seamed and fissured 
and stained brown from the penetration of iron rust. Where not 
_ stained they are colorless except for scattered minute black inclu- 
sions which occur in considerable quantity. They occasionally 
have prismatic outlines but are more often rounded or fragmental. 
Elongated fibers alternating with glassy or half-glassy lamellz also 
occur as previously noted. 
_A few well-marked aggregations of black, probably carbonaceous 
matter, occur mixed in a glassy or half-glassy ground mass, the whole 
having an approximately circular outline, and reaching in one case 
0.5 mm. in diameter. Here again a chondritic form is suggested 
but cannot be positively discerned. The carbonaceous matter is made 
up of smaller black particles not different from those included in the 
large chrysolite individuals. 
The bronzite usually occurs in the typical fibrous development. 
It is colorless to yellow, the latter perhaps being due to iron stain. 
Quite frequently large grains of an isotropic mineral appear which 
I cannot yet refer to any species with which lam familiar. The grains 
are marked by large size and freedom from inclusions and cracks such 
as characterize the other silicates of the meteorite. One grain seen 
has 0.7 sq. mm. of surface, another 0.5 sq. mm., while the remainder 
are smaller. The outline of the grains is irregular and separated from 
the remaining constituents. Good cleavage is shown in some of the 
grains and is apparently cubic, although in one individual the planes 
