133 
The Deep Well Waters of Sydney. 
By W. A. Dros, F.C.S., ELC. 
[Read before the Royal Society of N.S.W., 2 October, 1878.] 
E obtaining of a Water Supply for Sydney by means of 
(rn i Wells has been mooted at different times, and the suc- 
cessful results sisal in other counter ave been cited to 
one ii indeed, that the great supply of water drawn from 
the Botany Swamps during the drought of 1876 might be partly 
due %y petits artesian springs rising beneath the sand. 
waters obtained, with some conclusions draw 
following are analyses of the Sydney — as supplied in 
Hunter-street, in May last, and of a surface spring near 
Waverley, — nearly two years since for comparison with 
the deep water 
Sydney Water. 
Carbonate of calcium... as eE grains per oS 
Alumina and iron oxide traces ,, 
Chloride of pares ia eae eG 
sodium eae Ss ‘ 
Loss on sideman! A i. a 2 a 
Sulphate ro > on . 
Total solids... 3°74 
The pence Pukexacen slightly on ua. fod ccmeaiont traces 
of nitrates 
Free ammonia... “ee ... 0°01 parts per million. 
Albuminoid ,, 3.3) OR ig 
Spring at Waverley. 
Carbonate of calcium ... 1°90 grains per gallon. 
Chloride of magnesium... 2°15 ,, » 
$y sodium .., ee ” 
potassium ... traces ,, 2 
Sulphates : eee ... traces ,, ” 
Losson ignition ... ... 191 ” 
es 
: Total solids ... ge OMB gers Me 
