CVIII.- DISCUSSION. 
designed, and carried out by him under greater difficulties 
than fall to the lot of most men, and it received the endorse- 
ment of one of the leading hydraulic engineers of that time 
Mr. W. Clark. Next to the scheme for supplying water to 
Sydney from Prospect, came the design of the main system 
of sewerage for Sydney. This great work was the joint 
production of Mr. Moriarty and W. Bennett, and when 
submitted to Mr. W. Clark, was adopted by him with very 
slight amendment. I amina position to know that the 
work in connection with the evolution of these two great. 
schemes, occupied a very large share of his time, and when 
it is considered that in addition, he had to shoulder the 
responsibility in the conduct of a big department, the 
verdict of posterity will be that although he may have 
failed in some minor respects, the sum total of his services 
to the community was a distinct and lasting benefit, for 
which he should be gratefully remembered. 
Mr. Cardew made complimentary references to Mr. 
Moriarty and myself, for the work done in connection with 
the Sydney Water Supply, for whichI thank him. He was 
of opinion that a tablet should be erected somewhere to the 
memory of Mr. Moriarty. I think it would be a graceful 
act on the part of this Section of the Royal Society, if they 
were to draw the attention of the Council to the fact that 
no such tablet is in existence, with a request that they 
would make representation to the Board of Water Supply 
and Sewerage, with a suggestion that they repair the 
omission at an early date. 
He thought we had not sufficient data to go on in fore- 
casting the recurrence of dry and rainy periods. Mr. 
Russell thought he had discovered a 19 years cycle, but 
the 76 years record was insufficient to go upon. I would 
say that it is to be regretted we have not a longer record, 
but we have todo the best we can with what we have, 
