314 NOTES ON NATIVE FLORA OF NEW SOUTH WALES, YIL, 



areas around Cooma are undulating plains, valuable for grazing 



purposes in good seasons; while every siliceous prominence is 



denoted by forest-trees, though growing in an inferior soil. 



I am indebted to Mr. E. F. Pittman, Under Secretary for 



Mines, for permission to publish the following rock-analyses, A 



and D, which will appear in the Mines Department Annual 



Report for 1909. 



A. OH I'iyie- Basalt. B. Blotife-Granite. 



C/ O ' 



/o /O 



Silica 45-06 .. 66-58 



Alumina 14-60 ... 14-36 



Ferric oxide 2-60 ... \o^ 



Ferrous oxide 9-00 ... 3-19 



Magnesia 9*64 .. 1 70 



Lime 9-86 ... 4-lS 



Soda 2-90 ... 3-09 



Potash 0-85 ... 3 37 



Water(llOoC) 0-55 ... 0-17 



WateraiOoC + ) 2 73 ... 0-79 



Carbon dioxide 0-05 ... 004 



Titanium dioxide 1-55 ... 65 



Zirconium oxide abs. ... abs. 



Phosphoric anhydride 0-61 ... O'lO 



Sulphur trioxide abs. ... abs. 



Chlorine abs. ... abs. 



Sulphur(FeS.2) abs. ... abs. 



Chromium sesquioxide O'Oi ... abs. 



Nickel and cobalt protoxides. abs. ... abs. 



Manganous oxide. 0-l9 ... 07 



Baryta tr.* ... 0-04 



Strontia tr.f ... tr.f 



Lithia abs. ... tr.f 



Vanadium sesquioxide 002 ... tr. * 



100-23 99-86 



A. Olivine Basalt obtained 2^ miles from Cooma on Jindabyne Road. 

 Specific gravity, 2-911. (Analysis by Mr. H. P. White). 



B. Biotite-Granite from Kybean Road, north of Bega Road. Specific 

 gravity, 2-718. The absence of boric acid proved. (Analysis by Mr. H. P. 

 White). 



'" Less ihau U'Jl %. t Spectroscopic reaction only. 



