213 
On some New South Wales Minerals. 
By A. Liversipex, Professor of Geology and Mineralogy in the 
University of Sydney. 
[Read before the Royal Society of N.S. W., 8 November, 1880.] 
ALUNOGEN. 
commonly met with elsewhere in the caves and under overhanging 
ledges of the sandstone rocks of the Colony. 
Analysis. 
Water oP ie mae iis iets) 47°S88 
Matter insoluble in water bins pace Le 
Alumina ... ee gee se sa SASS 
Sulphuric acid ie: wa wv. =84°635 
Soda... te = a woes “931 
Potash a me oa aes me 337 
100-000 
The formula for the above is practically Al,0,3SO, + 18H,0. 
Another specimen from the same place was found to contain a 
hotable quantity of magnesium sulphate. 
Analysis. 
Water by difference on < ... 47°388 
Silica sere a Ore ee 1-908 
Alumina... 13°113 
Sulphuric acid 3-067 
A a opt ah 
100-000 
ANDRADITE—ComMoNn GARNET. 
Found associated with magnetite at Wallerawang ; of a brown 
colour, rather dull. ized in rhombic dodekahedra. Com 
pare the composition of this crystallized garnet with the massive.— 
magnetite from Wallerawang.) 
