CXXXIV. 
IRRIGATION GEOLOGICALLY CONSIDERED. 
hour, which rose in the vertical pipes 30 feet above the — 
surface. 
free carbonic anhydride, which distinguishes it from the 
ordinary artesian bore, and points to the probability of the 
flow being caused by the pressure of the gas. 
ing analysis of the Ballimore water was made by Mr. J.C. 
H. Mingaye, F.1.C., ¥.C.s.3—— 
Bicarbonate of sodium ... 
potassium 
lithium ... 
calcium... 
magnesium 
strontium 
99 
iron 
Chloride of sodium 
Alumina 
Silica 
Total solid matter 
Free ammonia Ri 
Organic or albuminoid ammonia 
Specific gravity of water at 65° F. 1°00359. 
The water contained a considerable quantity of 
The follow-. 
183°10 grains per gallon 
12°83 
°05 
11°38 
9°36 
trace 
70 
6°92 
trace 
°28 
224°62 
0°052 parts per 100, 
003 
99 
99 
000 
Trace of phosphoric acid present. The water has a pleasant 
taste and is highly charged with carbonic acid. 
According to the report’ by Mr. W. Anderson, F.G.8., (at 
that time Geological Surveyor in the Department of Mines, 
New South Wales, now Government Geologist of Natal,) 
the Triassic Hawkesbury Sandstone which there forms a 
thin capping on the hills is underlain by a coal measure 
series containing rootlets and leaflets of Glossopteris. The 
age of the artesian water bearing beds at Ballimore is 
therefore proved to be Permo-Carboniferous. 
+ Ann. Rep. Mines Dept., 1888, pp. 184 — 187. 
