This section is from the book "The Gardener's Monthly And Horticulturist V23", by Thomas Meehan. See also: Four-Season Harvest: Organic Vegetables from Your Home Garden All Year Long.
A Waverly (Md.) correspondent writes: "A young florist, a friend of mine, put up a range of houses last summer, heated by hot water. On the recommendation of some ignoramus he painted the pipes with gas tar, with the usual and inevitable result. He has painted them twice over the tar with boiled oil and lampblack; but that is useless, of course, seeing the heat must pass from within outward, and bring the fumes of the tar with it. I recommend as the only remedy to take down the pipes and burn it off."
[It could, perhaps, be burned off by torches or charcoal pans without taking all apart. - Ed. G. M.]