one-third of a day's labor
to the rod, we may set down the principal items of the cost of drainage
by the rod, as follows:

Cutting and filling per rod 33-1/3 cts.
Tiles 16-2/3 "
----
50

This is putting the tiles at one cent a foot, and the labor at two cents
a foot, or just twice as much as the cost of tiles, and it brings a
total of half a dollar a rod, all of them numbers easily remembered, and
convenient for calculation.

By reference to the table giving the number of rods to the acre, the
cost of labor and tiles per acre may be at once found, by taking half
the number of rods in dollars. At 42 feet distance, the cost will be
$31.42 per acre; at 30 feet distance, $44; and at 60 feet, half that
amount, or $22 per acre.

Our views as to the frequency of drains, may be found under the
appropriate head.

Our estimate thus far, is of four-foot drains. We have shown, under the
head of the "Depth of Drains," that the cost of cutting and filling a
four-foot drain is double that of cutting and filling a three-foot
drain. There is no doubt, that, after all the good advice we have given
on this subject, many, who "grow wiser than their teachers are," will
set aside the teachings of the best draining engineers in the world, and
insist that three feet deep is enough, and persist in so laying their
tiles.

This _shallowness_ will reduce the cost of labor about one half, so that
we shall have the cost of labor and tiles equal--one cent a foot, making
33? cents per rod, or one-third of a dollar, instead of one-half a
dollar per rod. To the cost of labor and tiles, we should add a fair
estimate of the cost of the other items of engineering and outlets.
These are trifling matters, which English tables, as has been shown,
estimate together, at about $1.67 per acre.

Briefly to recapitulate the elements of computation of the cost of
drainage, we find them to be these: the price of labor, the price of
tiles, and freight of them; the character of the soil, the depth of the
drains, and their distance apart, with the incidental expense of
engineering and of outfalls, and the large additional cost of _collars_,
where they are deemed necessary.

COMPARATIVE COST OF TILE AND STONE DRAINS.

It is not possible to answer, with precision, the question so often
asked, as to the comparative cost of drainage with tiles