Rodman Sands, New York, writes:

"Will a 12 inch earthen pipe be large enough to carry off the water from a stone drain, 2 feet square and 700 feet long ? The drain is simply a ditch 2 feet deep and 2 feet wide, filled with stones and covered over.

"I can give the earthen pipe a fall of about 5 feet in 700.

"The field, which is 700 feet square, floods in rainy weather, and now takes from three days to a week to run off, and I want to keep it dry all the time if possible."

[A 12-inch pipe would carry off the equivalent of about one third of an inch of rainfall per hour on the area to be drained. Ordinarily, this would keep the field dry, but in very heavy rainstorms there would be flooding of the field. A 2oinch pipe would insure perfect drainage]