8 Silliman and Kingsley on the Weston Meteor of 1807. 
water being one. The specific gravity of different pieces varies 
a little ; this is the mean of three. ° 
The color of the mass of the stone is mainly dark ash, or, 
more properly, a leaden color. It is interspersed with distinct 
masses, from the size of a pin’s head to the diameter of one or 
two inches, which are almost white, resembling in many instan- 
pea, but generally they are much smaller, They can be de- 
tached by any pointed iron instrument, and leave a concavity 
in the stone. They are not attractable by the magnet, and can 
be broken by the hammer. If any of them appear to be affected 
by the magnet, it will be found to be owing to the adherence 
of a portion of metallic iron. 
2. Masses of yellow pyrites may be observed. Some of them 
are of a brilliant golden color, and are readily distinguishable 
by the eye. Some are reddish and some are whitish. The 
pyrites appear most abundant in the light colored spots, where 
they exhibit very numerous and brilliant points, which are very 
conspicuous through a lens. 
3. The whole stone is interspersed with malleable iron, alloyed 
with nickel. These masses of malleable iron are very various 
in size, from mere points to the diameter of halfan inch. They 
may be made very conspicuous by drawing a file across the stone, 
4. The lead-colored mass has been described already, and 
constitutes by far the greater part of the stone. After being 
wet and exposed to the air, the stone becomes covered with 
numerous reddish spots, which do not appear in a fresh frac- 
ture, and arise manifestly from the rusting of the iron. 
_5. There are a few instances of matter dispersed irregularly 
through the stone, which are considered as intermediate between 
pyrites and malleable iron. They are sometimes in masses 
apparently crystalline, but usually irregular. They are black, 
and commonly destitute of splendor, but exposed by a recent 
fracture, they appear like a glossy superficial coating. They 
are sometimes attractable by the magnet, and sometimes not. 
