o4 AMERICAN MUSEUM GUIDE LEAFLETS 
long. More than a thousand fragments of this meteorite have been 
found, most of which weigh from J, of an ounce to 20 ounces, but a few 
weigh several pounds. Each is a perfect little meteorite. The largest 
of the group, which is exhibited here in the Foyer collection, weighs 
about 75 pounds. The black glassy crust over the surface of all the 
masses shows that the meteorite exploded early enough in its atmos- 
pheric flight for even the smallest fragments to become superficially 
fused by friction with the air. The fragments show a “primary”’ and 
FOREST CITY. 
Shows crust on large and small pieces. 
a “secondary” crust, the former formed before and the latter after the 
bursting of the original mass. 
Forest City consists essentially of feldspar, enstatite (a member of 
the orthorhombic-pyroxene group of minerals), graphite, troilite and 
nickel-iron. The iron is present in small particles disseminated through 
the masses and in definite lines suggesting the Widmanstiitten figures of 
a siderite. 
