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ON THE MINERAL CONSTITUENTS OE METEORITES. 
Explanation of the Plates. 
PLATE XXII. 
Figs. 1 & 2 represent sections of crystals of the augite as seen in the microscope with a 
power of 45 linear; that in fig. 1 is nearly in the zone [10 0, 0 10] and a 
little oblique to the plane 10 0; that in fig. 2 is slightly oblique to the plane 
0 01, and a little so also to the zone [0 01, 010]. The lines P, P indicate 
the planes of vibration. 
Figs. 3 & 4 represent sections, as seen in a microscopic slide cut from the meteorite, of 
crystals of enstatite, that in fig. 3 being nearly in the zone of the prism planes, 
and that in fig. 4 being nearly perpendicular to these. 
PLATE XXIII. 
Representation of the Busti meteoric stone, in two views taken from opposite points. 
The letter N indicates the position of the nodule containing the Oldhamite 
and Osbornite, of which a section is also represented in the Plate. All the 
drawings are of the natural size. 
