XXil. ABSTRACT OF PROCEEDINGS. 
EXHIBITS : 
1. Lenticular basalt, by Professor LIvERsIpGE. At Emu 
Bay, Tasmania, there is a very fine outcrop of columnar 
basalt. The faces of many of the columns, where weathered 
and acted upon by the sea water, show an irregular lamellar 
structure, as if the column were made up of thin imperfect 
plates or layers, and the tops of some of them have an 
imbricated appearance, from being covered with small, 
more or less lenticular shaped, pieces of weathered basalt. 
This structure is probably a modification of the cup and 
cone joints common in basalts. 
2. Specimens of pure Tin Metal from Mount Bischoff 
Mine in Tasmania. The molten metal had been dropped 
into water, resulting in beautiful fantastic incrustation 
like masses. By Professor ANDERSON STUART. 
3. Mr. OC. A. SUSSMILCH, exhibited two large geodes in 
basalt coated with large and beautiful crystals of quartz 
and calcite. In one example the quartz was brownish- 
black in colour (cairngorm), and in the other was of a pale 
amethyst-pink colour. In both examples the calcite 
crystals were of the type known as ‘‘Nail Head Spar,”’ 
some of which are over an inchin diameter. The specimens 
were obtained from the old Dundas Quarry near Parramatta. 
4, Mr. R. T. BAKER, F.L.S., exhibited (a) Section of a 
HKucalyptus tree 41 years old. This specimen was cut from 
Eucalyptus dealbata, about 12 feet from the ground, and 
measures 135 inches in diameter, and was planted for 
timber by Mr. W. Shipton, at Verona. The annual rings 
are not well defined, and run into each other, so that it 
would be impossible to determine its age by them. (b) 
Rabbit bones found inside a ewe, which was in a perfectly 
healthy condition at the time of slaughtering. These bones 
were coated with an encrustation of calcium carbonate, 
phosphate, and oxalate. (c) A specimen of a radio-active 
