349 
Ipsioich Coals. 
Waterstown, Ipswicli — 
Coal burnt 
Water evaporated ... 
Asb ... 
Tbomas’, Bundanba — 
Coal burnt 
Water evaporated ... 
Ash 
Walloon Coal — 
Coal burnt 
Water evaporated ... 
Ash ... 
Tivoli Coal, best — 
Coal burnt 
Water evaporated 
Ash ... 
Tivoli Coal, second — 
Coal burnt 
Water evaporated ... 
Ash 
^eio South IVales Coals. 
“ Waratah,” Newcastle, New South Wales — 
Coalburnt 
Water evaporated ... 
Ash ... 
Lb. 
100 
499 
18 
... 100 
... 507 
... 15 
100 
457 
13 
100 
561 
10 
100 
499 
12 
100 
505 
7-1 
“ Test oe Avebaob ebom all Pabts oe the J imboub Coal Seam, toe Oil, &c. 
lb. 
Goal distilled in retort 
... 
... 72 
Coke remaining in retort 
... 34 
OH, S.G. 0-975 
... 12 
Ammonia, Water 
... 5J 
TJneondensed Gas, &c. 
... 20| 
per cent. 
100 
47 
16-7 
7-6 
28'5 
“ The coal does not coke, and is not suited for coke or smiths’ forges and similar 
work. Average specific griivity, 1'275.” 
The output of the Jimhour Coal Field is given in the “ Annual Eeport ot the 
Department of Mines” for 1885 as 2,040 tons, valued at £1,020. 
The exact line of demarcation between the Ipswich and EolHng Downs Forma- 
tions has not yet been satisfactorily traced, but there is reason to believe that the former 
gradually passes upward into the latter on the inland side of a line running north- 
westward from the heads of the Macintyre to Dulacca Eailway Station. Beyond that 
line the presence of marine Cephalopoda and Pelecypoda sharply define the transi- 
tion from inland or freshwater to marine conditions. 
"Whether the Ipswich Coal Field can be traced beneath any large area ot the 
Boiling Downs Formation is a question which may in the next century assume an impor- 
tance comparable to that of the presence of coal beneath the Cretaceous rocks ot Kent. 
So far, none, or only one or two of the deeji bores for artesian water in the west have 
reached the bottom of the Eolling Downs Formation. The latter, in the north and west, 
directly overlies the older schists, so that the absence of the Ipswich Formation tlmre is 
certain. Its absence may be due rather to an upheaval at the end of the Ipswich Period 
than to the thinning out of the strata. 
