160 TANKS AND WELLS OF NEW SOUTH WALES, 
increases the cost of maintenance. Some of the igen 
drifts are very troublesome and difficult to deal with, and in such 
some few feet above it and then put down a carefully tubed bore 
en these works were just initiated several modifications of 
the type adopted were considered by the Department, and amongst 
these were :— 
k Brick-steining in lieu of slabbing. The objections to this 
and dimensions of the shaft that would have been necessary. 
The cost and difficulties before alluded to were also, at the ime 
prohibitory,. 
2. The employment of masonry and of puddle for service tanks 
was also considered, but at the time framed timber lined with 
1s available to keep them full, they would, if attended to, prove 
_ ose —— either the framed or masonry jand 
1” use would allow of a large storage at a small cost, W' 
, ec ie be utilized. 
Tron-framed, buckled plate tanks are now being tried, and 
Proeemtore lasting and economical than any other type 7% 
adop ted.. ' i 
PS en OE eee ee 
