34 M. FE. Wadsworth—Bishopville Meteorite. 
The portion examined is a grayish-white mass resembling, as 
Shepard remarked, a grayish-white granite (albitic), with brown 
and black spots. Under the microscope it is seen to be com- 
osed of an entirely —— mass of enstatite, augite, feld- 
spar, olivine, pyrrhotite and i e structure is essentially 
granitic, and it appears to Gees to the gabbro (norite) variety 
of the basalts as defined by myself in “Science” for March 9th, 
The enstatite is clear and transparent. It shows a longi- 
tudinal cleavage parallel to the line of extinction, and in some 
specimens this is crossed by acleavage at right angles, It also 
has a cleavage which is often, well marke and breaks the 
mineral into rhombic forms with angles, as Nae 
determined by several measurements, of 73° and 107°. The 
principal cleavage is parallel to the ‘longer diacoial of these 
rhombs. It is this rhombic cleavage, probably, which has led 
observers to behave that chladnite crystallized in the mono- 
clinic or triclinic systems. 
he enstatite is found to contain many glass oe with 
oy aa outlines, the planes being poplar ie 8 usual in 
This material, besides forming inclusions in the glass, is in len- 
ticular and irregular rounded grains in the enstatite itself. It 
sometimes extends in a series of grains across the entire ensta- 
tite mass and at others is in isolated forms. These inclusions 
microscopically are seen to be composed of a center of nickel- 
iferous iron or pyrrhotite, surrounded by a band of dark material, 
chromite or magnetite possibly. These ferruginous materials 
are in many cases surrounded by a yellowish-brown staining 
of iron which sometimes extends over a considerable portion of 
the mass and along the fissures. Along one plane in the en- 
statite numerous vacuum or vapor cavities were observed. 
The inclusions are seen to be crossed and cut by the cleavage 
and fissure planes of the enstatite, showing that they were of 
seo origin to the fissures. 
he feldspar stands next in abundance to the enstatite and is 
in irregular masses held in its interspaces. It is water-clear, 
and almost invisible by common transmitted light, Much of 
it is seen to be plagioclastic; but the twinning bands are so 
exceedingly fine and the polarization colors so bright it does 
not as a rule show well this character, except with high powers 
and when the mineral is near the point = extinction. The 
