Assuming the body-plan to be already swept in by the diagonal lines, (it matters not for our present purpose whether they are swept in the half-breadth,) we may now divide the body-plan into sections parallel to the base-line, as high as the load-line of flotation; and on those assumed water-lines take the half-breadths, the same as we would were we laying down a water-line model, or laying down the water-lines, which in fact we would be.