THE DEEP WELL WATERS OF SYDNEY. 133 
The water was analysed in June, 1877, and gave— 
Carbonate of calcium... 13°55 grains per gallon ) Deposit on 
Oxide ofiron... ... 1:54 . ) boiling, 15°09 
Chloride of calcium ... 1:13 ,, ye 
iy magnesium 11:12 _,, ” 
ss potassium > Bg.) eae = 
ss sodium ... 10°85 ,, 
Sulphates ee ... traces 
Silica and alumina... on fy ” 
Loss on ignition ee | eee ” 
Total solids ... 4699 _,, ” 
Total chlorine.. 16:18 18 
The residue blackened slighty on astion, nitrates were absent, 
and the water gave 
Free ammonia... Se ... 0°27 parts per million. 
Albuminoid ammonia... 0-01 
n the beginning of the present year the Company began to 
how on the well to its full extent, pumping about 50,000 gallons 
per day, and with this draught a considerable quantity ‘of fine 
clay was pumped up. ‘The clay is of a grayish colour, and con- 
tained a trace of carbonate of calcium ; it was exami by the 
somewhat in character; so a sainp e drawn on the Ist of March 
was se and gave— 
Carbonate of calcium ... 15°60 grains per gallon ret Pr a on 
Oxide of iron ... traces. ng, 15°60 
Alumina, silica, &, ... 571 ,, , 
Sulphate of calcium ... 1°03 _,, ” 
Chloride “ PR BSE age » 
%9 magnesium... 384, ” 
” potassium ... lis ,, - 
” sodium ie 24°89 ” ” 
Loss on ignition i A a ” 
Total solids ... 6372 , ” 
Total chlorine... 2015 5, » 
The residue reac  ighty on ignition, nitrates were absent, 
and ammonia was not 
