p. 25. 9 " 566 " 2,984 "
Sep. 26. 9 " 2,484 "
Oct. 1. 9 " 828 " There was
not enough
rain during
this period
to
materially
affect the
flow of
water.
Nov. 18. 9 " 83 "
Nov. 19. 9 " 1,132 " 184 " Rain 4.50
p.m. (18th)
to 8 a.m.
(19th.)
Nov. 20. 9 " 119 "
Nov. 22. 9 " 29,336 " 6,624 " Rain all of
the previous
night.
Nov. 22. 2 p.m. 6,624 "
Nov. 23. 9 a.m. 4,968 "
Nov. 24. 9 " 1,711 "
Nov. 24. 2 p.m. 1,417 "
Dec. 17. 9 a.m. 552 "
Dec. 18. 9 " 4,968 " Rain during
the previous
night.
Dec. 30. 10 " 581 "

"The tract drained by this system, though very swampy, before being
drained, is now dry enough to walk upon, almost immediately after a storm,
except when underlaid by a stratum of frozen ground."

The area drained by the main at which these gaugings were made, is about
ten acres, and, in deference to the prevailing mania for large conduits,
it had been laid with 6-inch sole-tile. The greatest recorded discharge in
24 hours was (August 25th,) less than 100,000 gallons from the ten
acres,--an amount of water which did not half fill the tile, but which,
according to the tables referred to, would have entirely filled it.

In view of all the information that can be gathered on the subject, the
following directions are given as perfectly reliable for drains four feet
or more in depth, laid on a