3 
able to pipe tiles for this purpose, being so much more easily cleansed. 
As to the first cost of this to me, it might amount to fourteen shillings, 
this is not including the deep drain which was put in some eight years 
previously ; and the expense of cleaning it is not above (10s.) ten 
shillings per year. Some time ago I had occasion to alter the course 
of this drain on its way to the river, and I went down into it and 
smelled it carefully and could detect no smell at all of an offensive 
nature. "Water was running in it at the time, although slowly. 
It has been stated that my place is exceptionally situated, that 
what is done there could not be done all over the city. Doubtless 
there are places in which this plan could not be so efficiently carried out, 
as, for instance, in houses situated at the lowest part of an allotment. 
But in nine houses out of every ten in the city, there would be no 
difficulty at all in carrying it out. 
What would be required would be somewhat as follows : — A pipe- 
tile drain would be required up each natural watercourse, and placed, 
if possible, at least four feet below the surface. Erom these main- 
drains, subsidiary drains would have to be laid, having junctions to 
each allotment. Erom these junctions a two-inch pipe to be laid up to 
near each house, and at least three feet below the surface, if possible. 
About fifty feet of horse-shoe tiles to be laid on hardwood boards, 
about ten inches from the surface, and about four or five feet on each 
side of the deep drain. It might be desirable to lay more than one 
deep drain, and put the distributing drains between them — in fact, 
drain and irrigate the ground ; but that is going beyond the scope of 
my present paper, although the benefit to be derived from that cannot 
for a moment be questioned. 
These drains would have to be laid by persons specially appointed 
for that purpose, and proper plans kept of them ; and it would have 
to be made an offence at law for anyone else to interfere with the deep 
drains. It strikes me that the cleaning of the shallow drains had best 
be done by these same parties, inasmuch as that it could be done so 
much cheaper, than by each party cleaning his own. 
It might be objected to this system that the ground would event- 
ually get saturated with ammonia or other offensive gasses. To obviate 
such it would be requisite to have trees planted near the drains. The 
health-giving properties of gum-trees seems now to be a recognised 
fact, so that making it compulsory to have such trees planted would be 
necessary. There is no reason why grape-vines should not also be 
planted and trained up the gum-trees, and I doubt not but that they 
would give a very good account of the ammonia in splendid bunches of 
grapes. These are mentioned, but all trees and plants absorbe ammonia 
with avidity. 
The probable cost would be somewhat thus : — Average of main and 
subsidiary drain to each house, say 50 feet, and take six-inch pipe-tiles 
