Sir March 22^nd 1798 I have the pleasure to enclose, you an estimate of the quantity and Weight per foot of Copper, it will require for Coppering vessels of the following Tonnage, as well as the number of nails necessary for each foot, given the Sheets are three feet nine inches long by 14 Inches wide, if the sheets are larger or narrower they will require more or less nails. Vessels of 100 Tons Burthen will require 1600 feet Copper of 20 oz pr foot 120 do. . . . . . . . . . . 2200 do. . . . do 150 do. . . . . . . . . . . 2500 do. . . . 22 oz 200 do. . . . . . . . . . . 3200 do. . . . do 250 do. . . . . . . . . . . 3500 do. . . . 24 oz 300 do. . . . . . . . . . . 4500 do. . . . do 350 do. . . . . . . . . . . 5000 do. . . . 26 oz 400 do. . . . . . . . . . . 5300 do. . . . do 450 do. . . . . . . . . . . 6000 do. . . . 28 oz 500 do. . . . . . . . . . . 6500 do. . . . do 600 do. . . . . . . . . . . 7500 do. . . . 30 oz 750 do. . . . . . . . . . . 9000 do. . . . do Nails it may not be unnecessary to add for 1½ Inches, 1¼ In. 1¼ In. 1 In. ⅞ of an Inch & ¾ of an Inch copper bolts, they are under the same disadvantage as the sheets, they are obliged to cut them before they can be shipped, which causes great waste in the bolts. I am very respectfully Joshua Humphreys Tench Francis Esq^r.