ARTESIAN WATER IN ROCKS OTHER THAN CRETACEOUS. 413 
lower members of the Cretaceous rest directly on sandy members 
of the Ipswich coal measures which dip in the same direction. In 
this case the sandstone beds above the Toowoomba basalts, and 
the Murphy’s Creek beds below, would feed the Blythesdale 
Braystones, and still further tend to equalize the supply by mak- 
ing good the loss entailed by the supposed connection of the latter 
with the ocean.” 
Up to the present time, however, no bores in search of artesian 
water have been put down in the Trias-Jura rocks of the Downs 
to the north-east of the line of outcrop of the Blythesdale Bray- 
stone. Two bores have been put down in the Ipswich coal 
measures to the east of the Dividing Range, but neither of them 
was very successful. The site of one of these bores was Eagle 
Farm, near Brisbane racecourse, and here an artesian supply of 
about eight thousand gallons of inferior water per day was 
obtained. The other bore was at Laidley, fifty-one miles west of 
Brisbane, and it did not result successfully, so far as obtaining an 
artesian supply. It appears to me, however, that the positions of 
both these bores were unfavourable. The coal measures at Eagle 
Farm appear to be, to all intents and purposes, isolated from the 
main body of the Ipswich coal measures which underlie the Downs; 
fora large part of the city of Brisbane is built upon hills of 
paleozoic schists, against which the coal measures thin out, and 
which act as a barrier between those on the east, and those on 
the west of Brisbane; the Laidley bore, also, does not appear to 
be favourably situated, when its altitude and that of the intake 
beds are taken into consideration. 
With the country, however, to the west of Toowoomba, the 
conditions appear to me to be very different. Murphy’s Creek 
railway station, to the east of Toowoomba, is 788 feet above sea 
level, and from there up to the top of the Dividing Range near 
Toowoomba, are seen, at elevations increasing up to about 2,000 
feet, outcrops of sandstones of the Trias-J ura formation, with some 
Supposed interbedded lavas. Some of these sandstones, (samples 
of which are exhibited) are very porous, and are therefore well 
