136 H. A. Ward — Four New Australian Meteorites. 



its reaching our atmosphere. A most interesting feature of 

 the iron is noticed on the small end (see cut), where there is a 

 prominent ridge or selvedge, having the semblance of being 

 formed by the metal fusing and then being turned over the 

 edge. The length of this ridge, following around the curve, 

 is 27 cm , and it extends from 1 to 3 cm inwards from the edge. 

 Nothing but a deep surface melting can have caused this. The 

 entire surface is of a lustrous reddish-brown hue, with the 

 metal showing prominently through it in some places. 



The Widmanstiitten figures are quite regular in size, but 

 very dim on account of the great number of small flakes, 

 probably of schreibersite, scattered through the mass. As far 

 as sectioned, the troilite nodules have been few in number and 

 very small in size, the largest being only 12 mm in diameter. 



This iron is octahedral. 



Analysis of the Roebourne Meteorite by Mariner and Hoskins, Chicago, 111. 



Fe 90-914 



Ni 8-330 



Co -590 



F -156 



S _ trace 



Mn ._ trace (?) 



Si -010 



C trace 



100-000 

 Specific gravity ._ 7*78 



Ballinoo. 



This siderite was found early in 1893 by George Demmack, 

 a shepherd, on the water-wash of a tributary of the Murchison 

 River, about ten miles south of Ballinoo, West Australia. It 

 was taken to the Fublic Museum of Perth, where I obtained 

 it in June, 1896, together with its history as here given. 



The length of the mass was 34 cm ; its width 27 cm ; and its 

 greatest thickness ll cm . It weighed 93 lbs. or 42*9 kilos. In 

 appearance it suggests a huge flattened potato. 



Its pittings are comparatively few; on face showing in cut, 

 there are but Ave that are prominent. All of these, how- 

 ever, are of special interest from the fact that they show a 

 pitting within a pitting, the inner one having been formed in 

 each case by the troilite having been worn away to a greater 

 depth than the iron surrounding it. That this is the cause is 

 shown clearly on a cut surface parallel to the pitted face 

 (shown in cut) and 5 cm from it. Here a troilite 3 cm in diameter 

 corresponds with the large pitting in lower left-hand corner of 



