85 



rrom these data and from levels taken witli the aneroid 

 barometer, I laid down last year a hydro-geological section of 

 -the country from the Coonatto Eange, past the township of 

 Bruce, across the Willochra Valley, and the Flinders Range 

 referred to, as far as the next valley of the Capoivie Creek. 

 On this section I showed the line of surface, and underneath 

 and nearly parallel to it the line of saturation or underground 

 water line on the slope of the hills where my data extended, 

 and then projected this latter line under the plain at the town- 

 ship of Bruce at a depth of about 190 feet from the surface. I 

 notice whilst writing that a boring party under the Conser- 

 vator of AYater (J. "W". Jones, Esq.) have just struck good water 

 near Bruce at a depth of 215 feet, which is artesian, and rising 

 to the surface, flows over at the rate of 10,000 gallons per day. 

 The water is found in a bed of white sand two feet six inches 

 thick, which has a bed of white clay above it three feet in 

 thickness, and a similar bed below it two feet in thickness. 

 These beds of clay seem to act as a channel enclosing and 

 -conveying the water from its source, which is most probably 

 from percolation into the alluvial beds from the creek at some 

 j)oint below the anticlinal axis. 



The conclusions I am inclined to draw from these and other 

 similar data are the following, viz. : — (L) The underground 

 waters coming from the hills in that district are flowing below 

 in the same general direction as the fall of the surface of the 

 country, and on a line nearly parallel to it. It is most probable 

 that the same conditions prevail generally throughout the 

 Minders Eanges, of which this is a part. The underground 

 waters from the Mount Lofty Range seem also to pass under 

 'the plain in a similar position. 



At Grlen Osmond, where the surface is 469 feet above sea 

 level, the line of saturation is about 26 feet to 40 feet from the 

 surface. This line passes under and nearly parallel to the sur- 

 face to Adelaide, where it is about 70 feet below the City level. 

 In the bore at Kent Towd, according to the notes by Professor 

 Tate, E.G-.S., &c., published in the Society's Proceedings, the 

 depth of water is also 70 feet. Proceeding westward to Kil- 

 kenny, the main body of water is at depths varying from 76 

 feet to 118 feet ; in addition to this, at the latter place, water 

 is found at a little less depth. At Port Adelaide the only deep 

 boring record I have been able to obtain shows that down to a 

 depth of 100 feet from the surface this main stream of water 

 is not reached. 



On the plain of the River Wakefield, which I examined last 

 year, there is a remarkable peculiarity in the underground 

 waters, which there appear to be divided into two streams 

 junning parallel to each other, one of which is quite salt 



