-+----------+------------++---------+----------+------------
ft. in. | | || ft. in. | |
0.3 | 1.23 | 277487.7 || 5.3 | 5.35 | 1206959.3
0.6 | 1.65 | 372239.7 || 5.6 | 5.47 | 1234031.3
0.9 | 2.01 | 453455.7 || 5.9 | 5.59 | 1261103.3
1.0 | 2.33 | 525647.7 || 6.0 | 5.71 | 1288175.3
1.3 | 2.60 | 586559.7 || 6.3 | 5.83 | 1315247.3
1.6 | 2.85 | 642959.6 || 6.6 | 5.95 | 1343838.9
1.9 | 3.08 | 694847.6 || 6.9 | 6.07 | 1369391.3
2.0 | 3.30 | 744479.7 || 7.0 | 6.17 | 1391951.2
2.3 | 3.50 | 789599.6 || 7.3 | 6.27 | 1414531.1
2.6 | 3.70 | 844719.7 || 7.6 | 6.39 | 1441583.2
2.9 | 3.89 | 877583.5 || 7.9 | 6.50 | 1466399.3
3.0 | 4.05 | 913679.5 || 8.0 | 6.60 | 1488959.2
3.3 | 4.21 | 949775.6 || 8.3 | 6.70 | 1511539.1
3.6 | 4.37 | 971658.7 || 8.6 | 6.80 | 1534099.0
3.9 | 4.53 | 920447.4 || 8.9 | 6.90 | 1556658.9
4.0 | 4.67 | 1055551.4 || 9.0 | 7.00 | 1579199.3
4.3 | 4.81 | 1086135.4 || 9.3 | 7.10 | 1601759.2
4.6 | 4.95 | 1116718.7 || 9.6 | 7.20 | 1624319.1
4.9 | 5.08 | 1146047.4 || 9.9 | 7.29 | 1644622.1
5.0 | 5.22 | 1177631.3 || 10.0 | 7.38 | 1664927.1
====================================================================

HOW WATER ENTERS THE TILES.

How water enters the tiles, is a question which all persons unaccustomed
to the operation of tile-draining usually ask at the outset. In brief,
it may be answered, that it enters both at the joints and through the
pores of the burnt clay, but mostly at the joints.

Mr. Parkes expresses the opinion, based upon careful observation, that
five hundred times as much water enters at the crevices as through the
pores of the tiles! If this be so, we may as well, for all practical
purposes, regard the water as all entering at the joints. In several
experiments which we have attempted, we have found the quantity of water
that enters through the pores to be quite too small to be of much
practical account.

Tiles differ so much in porosity, that it is difficult to make
experiments that can be satisfactory--soft-bu