Journ. Nat. Hist, and Sci. Soc., W.A. Vol. V. Plate XIX. 
Fig. 2. 
At the time of going 
to press, no drawing 
had been supplied by 
tbe Author. 
Fig. I. 
Fig 
i.— Section of button shaped Auslralite, showing the Core to be almost 
homogeneous, with much disturbance from the downwaid flow of the 
excess of glass forming the ring and exhibiting well the chin “d ’ 
restrained by the surface film on the inner side from flowing on to and 
coalescing with the Core. 
Fig. 2. — Bleb or glass bubble showing Convex Surfaces both inside and outside 
the Bubble. 
