PAY MINERAL CENSUS OF AUSTRALASIA. 
of very thin films and strings, which follow the cracks 
in the calcite and junctions of the crystals rather than. 
the cleavage planes of the crystals. The calcite cleaves 
well, is white, but shows iron stains in parts (L.) 
GRAPHITE.—Undercliff, between Wilson’s Downfall and River- 
tree, New England; Analyses, Dept. of Mines 
Laboratory, 1888 :— 
Moisture (at red heat) a ie Oi 
Silica ae ae ote eee 
‘Alumina, | .. ee 22) PSS 
Oxide of iron oe 1? trace 
Lime roe {ie ‘96 
Magnesia... Ls st Fda 
Carbon See oe ... 46°28 
99-90 
Moisture? <*.c. oie RY ioe 
Carbon K. J 34:40 
Gangue {os te iste LOS 
100-00 | 
See also “ Minerals of N.S.W.,” Liversidge, p. 121. The ; 
graphite mined at the Undercliff Station looks of very 
good quality when rubbed and polished, but on 7 
breaking the nodules open they are seen to contain a . 
good deal of earthy matter, one nodule examined for 
me by Dr. G. 8. Mackenzie in the university chemical 
laboratory was found to contain only 30 per cent. of 
carbon, hence for most commercial purposes the graphite 
would require purifying before it could be used. Asso- 
ciated with the graphite are rolled pebbles of quartz 
and rock erystal (L.). 
Kao in ! ! !.—Shaking Bog, near Tumut; Analysis, Dept. of 
Mines Laboratory, 1888 :— 
Moisture at 100 C er ae 6°10 
Combined moisture... ae LOANS 
Silica bret: ae see LAG 
Alumina Ss a sts, OR ae 
Oxide of iron Nh minute trace 
Lime nee ae oe Die, 
Magnesia... => ... . UPBce 
Alkalies, ete. td wet RS 
100-00 
