163 
On the Inorganic Constituents of the Coals of New 
South Wales. 
By W. A. Dixon, F.LC., F.C.S., Lecturer on Chemistry, Technical 
College, School of Arts, Sydney. 
[Read before the Royal Society of N.S.W., 6 October 1880.] 
which are thrown aside in actual working. Having the residue of 
hese samples and some others, it appeared that information of . 
Some interest might be obtained from an examination of the ash, 
and it was hoped that some light might be thrown on the insoluble 
constituents of the plants from which the coal has been form 
, in the case of coals whose ash contains little iron, is an 
exceedingly tedious process, so that in some of them it was found 
necessary to determine the residual carbon, and deduct it from the 
ash was then treated by digestion with hydrochloric 
ane te of the Colony naturally divide themselves into three 
and th, namely, those of the Northern, Southern, and Western fields, 
the character of the ash follows, as a rule, the same divisions, 
*xcept that the ash of the coal found at Redhead, eight miles south 
in eweastle, differs from that of the others in its neighbourhood 
fonts much less iron and alumina, and an increased quantity 
Silica. With the coals of the Northern district may be taken a 
a from the Clarence River district, the ash of which was 
ed from a small hand specimen only. 
se whole of the ashes showed traces of alkalies, carbonic acid 
ri of po besides those constituents given, gorep a cenegs “ates 
very minute. T ing are m 
the Nort} lds carey The following yses 
oO 
