THE WATER SUPPLY OF SYDNEY. CXIIlI. 
this I would reply, that | am quite sure if Mr. Houghton 
will give this matter the cosideration that I have done, he 
will find that he could not possibly obtain the necessary 
elevation to supply even Crown Street reservoir, let alone 
the higher levels of the city by gravitation, without going 
a very long way back from the junctions of either of these 
streams with the Nepean River. Both the Royal Com- 
mission of 1869, and Mr. W. Clark, fully inquired into these 
sources of supply, but owing to the long length of piping 
required in each case, ranging from 50 to 60 miles, they 
were discarded. The whole matter resolves itself into one 
of cost, to obtain an adequate additional supply, to com- 
mand the highest levels of Sydney by gravitation, and I 
can assure Mr. Houghton that having studied the question 
very closely, | now rest quite satisfied, that when the 
question of additional supply comes to be inquired into by 
the proper tribunal, the Woronora scheme can be depended 
upon to hold its own. 
Dr. Stokes dealt with the estimate of water likely to be 
required. ‘“‘ He was of opinion that a low estimate should 
not be taken. Heagreed with Mr. Cardew that 60 gallons 
should not be considered the limit of supply. We would 
be using larger quantities of water in the near future.”’ 
In reply, I would say, that I dealt with this matter fully in 
my address, and my reasons are clearly stated for antici- 
pating a quick rise from the present rate of consumption 
per head, about 38 gallons per day, to 60 gallons, and I 
concur with Mr. Cardew, that if manufacturing industries 
become established, as may be anticipated under the 
Federal Tavriff, the rate of 60 gallons per head may very 
soon be found much too low. Dr. Stokes thought that 
‘‘quantity and quality should go hand in hand. It wasa 
question whether it was wise to count upon water being 
entirely satisfactory as caught and stored in reservoirs 
