A meteoritp: from zului.and. 109 



and Plessite, a eutectic or eutectoid betkeen kamacite and 

 plessite, and as a compound Fio^^i (Nickel 9.5 %). 



I have, therefore, assigned names with considerable hesita- 

 tion and in accord, as already stated, with the structure rather 

 than with the chemical composition. 



While they may serve for the present description, they must 

 be regarded as subject to revision. 



The nature of the section corresponds, I think, to '* medium 

 octahedrite." Comparatively little of any accessory con- 



stituent is apparent, but there are several smaM isolated jiatches 

 of a hard, bright, white constituent, apparently brittle, since it 

 appears often cracked and broken, occurring generally in the 

 centre of a large bar of kamacite. These can be seen in photo- 

 graph No. 6, and several of the other photos, and photograph 

 No. 9 (Plate 6) shows an enlarged view of one such occurrence 

 (X 170 diameters*). (The black patches are simply depres- 

 sions more or less filled with the polishing material). They 

 are chiefly of long drawn out form of length up to 3 mm, 

 and width about .3 mm, and show angular outlines. 



They appear to be the brittle constituent separated by aci J 

 treatment, probably " schreibersite." 



At the edges of soiue of them, little excrescences of rust 

 became visible after a few days' exposure to the atmosphere, 

 possibly due to specks of " lawrencite," a trace of chlorine having 

 been detected. 



Even on examination of the section by the unaided eye, a 

 band of different appearance to the rest is seen down one side^- 

 which originally was at the outside of the meteorite — varying in 

 thickness from about 2 mm, where a " Hp " is evident, down to 

 zero. Photograph No. 10 (X 18) shows an enlarged view of 

 a portion of this ( and indeed of every constituent of the 

 meteorite), and it will be noted that a banded or zoned structure 

 is apparent, indicating probably that this outer layer has been 

 fused, or at least caused to become plastic, and flow, so that it 

 has lost all trace of its former structure. The line of division 

 between the crystalhne and altered structure is quite sharp. 



The same photo also shows a curious inter-penetration of 

 kamacite, one small bar apparently piercing another. 



The kamacite appears to be very well defined wherever it 

 occurs. This is seen, for instance, in photograph No. 11. where 

 every bar, though of irregular shape, has quite sharp outlines. 

 Under higher power ( X 170) its structure is shown in photo- 

 graph No. 12. 



The dark lamellae between the bars, apparently " taenite,' 

 on the other hand, are only sharply defined on both sides when 

 between two nearly adjacent bars of kamacite 



When the kamacite is some little distance apart, leaving 



*The magnifications are those of the original photo?, which for purposes of 

 reproduction have been reduced to two thirds. 



