Put into a large tub 1 barrel of wood-ashes lye, 5 pounds white vitriol, 5 pounds alum, and as much salt as will dissolve in the mixture. Make the liquor quite warm, and put in as many shingles at a time as it will co ver. When one batch of shingles is well soaked, remove and put ill another. Then lay the shingles in the usual manner.

With the liquor that is left, mix enough lime to make whitewash, and color with lampblack, ochre, or Spanish brown. Apply to the roof with a brush or old broom. This wash may be renewed from time to time. Shingles, Painting.-Lay low-priced shingles-say from $2.75 to $4 per thousand-and paint them with a coat of tar and asphaltum Bay one barrel coal-tar, costing $3; ten pounds of asphaltum at:; cents, 30 cents; ten pounds ground slate, at 1 cent, 10 cents; two gallons dead oil at 25 cents, 50 cents, which should be added alter the other has been wetted and thoroughly mixed. This mixture is as good as any thing that can be put on to Shingles, as it will thoroughly keep the water out; and, if dry, they will not rot under the lap, nor will the nails rust.