176 INORGANIC CONSTITUENTS OF THE 
EsKBANK. 
Svecific gravity of coal, 1:329 ; sae of ash, 9:88; 
colour of ash, grey. 
Analysis— 
umina ... eas 3T-TS41 
Ferric oxide... oes oo ee 
Lime sae xen ‘oe -78 | Soluble in acid 
O61 “ses ain ices 6 24°61 
Sulphuric oxide A 16 
Phosphoric ,, “DD | 
Alumina ... a poeple & Oy 
Magnesia ... Hr ... trace. { Insoluble in acid 
Silica it ao Redemet Es 75°23 
Undetermined and loss ‘15 
100-00 
Litacow VALLEY 
Specific gravity of coal, 1340 ; percentage of ash, 9 68 ; 
colour of ash, greyish white. 
Analysis— 
‘Aleiatinn fee oe ae 
Ferric oxide... 1-42 Shae 
Lime 74 | Soluble in acid 
Magnes bas ae ‘57 23°72 
Suloborie oxide... on ‘11 
Phosphoric ,, is oes “64 
Alumina ... oA #a2 1602 Je in acid 
Silica. aa 60: a es 
Undetermined and loss 05 
100-00 
The ashes of these coals show a notable increase f ptm ol 
centage of silica, as compared with those of the other solubl nape 
they differ also in presenting a much lower ratio of before, 
insoluble alumina. The ratios, taking the insoluble as 1, a8 
. 15 
Val tO id. ka 
oes — : oor 
Lithgow ss 
The phosphoric oxide is intexmedatek $s 
Hunter River and Southern districts, but, re we roar te mar the a 
ditional quantity of insoluble ash as int troduce 
sources, it would more nearly approach the — 
